City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Beard Road between Pueblo Ave & Trancas St
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
NB-SB
Recorder:
JCL
20 45
Date:
5/14/2025
Day:
Wednesday
21 46
Begin Time:
4:00 PM
End Time:
4:30 PM
22 1
47 Weather:
Clear, Warm, Dry
Land Use:
Res / Comm
23 2
48 24
5 49
Summary Statistics
25 6
50 Total Observed
111
26 8
51 Speed Range
22 -
34 27
21 52
50th percentile speed
28 28
20 53
85th percentile speed
30 29
17 54
10 mph pace speed
24 -
33 30
15 55
% in pace speed
96 31
8 56
Skewness index
1.000
32 5
57 33
2 58
34 1
59 35
60 36
61 37
62 38
63 39
64 40
65 41
66 42
67 43
68 44
69 T O T A L
111
ANALYSIS INFORMATION
Segment Length (mi.):
0.51 ADT:
3,599
Count Date:
5/13/2025
Number of accidents:
5 Time period:
5 years
Calculated Crash Rate =
1.49 Fatal + Injury crashes per million vehicle-miles
Street Width (ft):
40 ft
Configuration:
2 Lanes
Terrain:
Flat
Parking Conditions:
Both
Sidewalk:
Discontinuous
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 30mph, adjacent residential properties, a crash rate 3x the State District Average, it is the Engineer's judgement to lower the posted speed limit to 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph_
_ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Browns Valley Road between Partrick Rd & Redwood Rd
Posted Limit:
35mph
Speed
Number
Speed
Number
Direction:
NB - SB
Recorder:
EBM
20 45
Date:
12/4/23
Day:
Monday
21 46
Begin Time:
1:20pm
End Time:
2:00pm
22 47
Weather:
Clear Dry Warm
Land Use:
Residential
23 1
48 24
1 49
Summary Statistics
25 7
50 Total Observed
108
26 3
51 Speed Range
23 -
35 27
4 52
50th percentile speed
31 28
10 53
85th percentile speed
32 29
9 54
10 mph pace speed
25 -
34 30
15 55
% in pace speed
96 31
18 56
Skewness index
0.500
32 25
57 33
8 58
34 5
59 35
2 60
36 61
37 62
38 63
39 64
40 65
41 66
42 67
43 68
44 69
T O T A L
108
ANALYSIS INFORMATION
Segment Length (mi.):
0.59 ADT:
3,248
Count Date:
5/5/22
Number of collisions:
2 Time period:
3 years
Calc. Crash Rate =
0.95 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2Ln+ Bike
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 32mph, adjacent residential properties, a crash rate 2x of the State District Average, it is the Engineer's judgement to lower the posted speed limit to 30mph. No significant changes have occurered in the roadway or in traffic conditions within the limits of this ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 30mph
_ is hereby determined to be reasonable for
the above street segment.
0 5
10 15
20 25
30 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Posted Limit:
40 MPH
Speed
Number
Speed
Number
Direction:
NB-SB
Recorder:
JCL
25 50
Date:
5/29/2025
Day:
Thursday
26 51
Begin Time:
10:30 AM
End Time:
11:30 AM
27 52
Weather:
Clear Warm Dry
Land Use:
Residential
28 53
29 54
Summary Statistics
30 2
55 Total Observed
114
31 1
56 Speed Range
30 -
45 32
2 57
50th percentile speed
39 33
2 58
85th percentile speed
41 34
1 59
10 mph pace speed
35 -
44 35
11 60
% in pace speed
92 36
8 61
Skewness index
0.750
37 11
62 38
18 63
39 16
64 40
19 65
41 10
66 42
6 67
43 4
68 44
2 69
45 1
70 46
71 47
72 48
73 49
74 T O T A L
114
ANALYSIS INFORMATION
Segment Length (mi.):
0.51 ADT:
5,308
Count Date:
5/14/2025
Number of accidents:
0 Time period:
5 years
Calc. Crash Rate =
0.00 Fatal + Injury crashes per million vehicle-miles
Street Width (ft):
35 Configuration:
2 Lns+ Bikes
Terrain:
Rolling Hill
Parking Conditions:
None
Sidewalk:
East Side Only
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Buhman Avenue between So City Limit & Crestview Wy
Based on the 85th percentile speed of 41mph, a short section of Bike Lane removal / Share the Road to accommodate a left turn pocket, it is the Engineer's judgement to lower the posted speed limit to 35mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of ___ 35mph
___ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Buhman Avenue between Crestview Wy & Browns Valley Rd
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
NB-SB
Recorder:
JCL
15 40
Date:
5/29/2025
Day:
Thursday
16 41
Begin Time:
9:30 AM
End Time:
10:30 AM
17 42
Weather:
Clear Dry Warm
Land Use:
Sch / Res
18 43
19 44
Summary Statistics
20 3
45 Total Observed
119
21 5
46 Speed Range
20 -
32 22
6 47
50th percentile speed
26 23
9 48
85th percentile speed
29 24
14 49
10 mph pace speed
21 -
30 25
17 50
% in pace speed
93 26
13 51
Skewness index
1.000
27 18
52 28
11 53
29 8
54 30
10 55
31 1
56 32
4 57
33 58
34 59
35 60
36 61
37 62
38 63
39 64
T O T A L
119
ANALYSIS INFORMATION
Segment Length (mi.):
0.29 ADT:
7,900
Count Date:
5/14/2025
Number of accidents:
1 Time period:
5 years
Calc. Crash Rate =
0.24 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2 Lanes
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Both
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 29mph, adjacent Elementary School and City Park, it is the Engineer's judgement to lower the posted speed limit to 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
California Boulevard between Lincoln Ave & Pueblo Ave
Posted Limit:
35 MPH
Speed
Number
Speed
Number
Direction:
NB-SB
Recorder:
JCL
20 45
Date:
6/5/2025
Day:
Thursday
21 46
Begin Time:
2:40 PM
End Time:
3:20 PM
22 47
Weather:
Clear Warm Dry
Land Use:
Residential
23 48
24 49
Summary Statistics
25 50
Total Observed
110
26 51
Speed Range
27 -
39 27
1 52
50th percentile speed
34 28
2 53
85th percentile speed
36 29
1 54
10 mph pace speed
30 -
39 30
6 55
% in pace speed
96 31
10 56
Skewness index
0.857
32 13
57 33
16 58
34 15
59 35
21 60
36 15
61 37
7 62
38 2
63 39
1 64
40 65
41 66
42 67
43 68
44 69
T O T A L
110
ANALYSIS INFORMATION
Segment Length (mi.):
0.51 ADT:
15,246
Count Date:
5/13/2025
Number of accidents:
11 Time period:
5 years
Calc. Crash Rate =
0.78 Fatal + Injury crashes per million vehicle-miles
Street Width (ft):
56 Configuration:
2Ln, M, 2Bk
Terrain:
Flat
Parking Conditions:
None
Sidewalk:
Both
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 36mph, a crash rate 2x the State District Average, it is the Engineer's judgement to lower the posted speed limit to 30mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of ___ 30mph
___ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
California Boulevard between Pueblo Ave & Trancas St
Posted Limit:
35mph
Speed
Number
Speed
Number
Direction:
NB - SB
Recorder:
EBM
20 45
Date:
12/4/23
Day:
Monday
21 46
Begin Time:
3:45pm
End Time:
4:30pm
22 47
Weather:
Clear Dry Warm
Land Use:
Commercial
23 48
24 1
49 Summary Statistics
25 3
50 Total Observed
114
26 2
51 Speed Range
24 -
38 27
4 52
50th percentile speed
32 28
4 53
85th percentile speed
34 29
9 54
10 mph pace speed
27 -
36 30
12 55
% in pace speed
92 31
13 56
Skewness index
0.889
32 16
57 33
18 58
34 15
59 35
9 60
36 5
61 37
2 62
38 1
63 39
64 40
65 41
66 42
67 43
68 44
69 T O T A L
114
ANALYSIS INFORMATION
Segment Length (mi.):
0.54 ADT:
10,678
Count Date:
4/21/22
Number of accidents:
9 Time period:
3 years
Calc. Crash Rate =
1.43 Fatal + Injury Crashes per Million Vehicle Miles
Street Width (ft):
Varies
Configuration:
2Ln+ Bikes
Terrain:
Curves
Parking Conditions:
Discontinuous
Sidewalk:
Both
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 34mph, a crash rate over 3x the State District Average, it is the Engineer's judgement to lower the posted speed limit to 30mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 30mph
_ is hereby determined to be reasonable for
the above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Coombsville Road between Terrace Dr & East City Limit
Posted Limit:
35mph
Speed
Number
Speed
Number
Direction:
EB - WB
Recorder:
EBM
20 45
Date:
12/11/23
Day:
Monday
21 46
Begin Time:
1:35pm
End Time:
2:15pm
22 47
Weather:
Clear Dry Cool
Land Use:
Res / Com
23 48
24 49
Summary Statistics
25 1
50 Total Observed
110
26 1
51 Speed Range
25 -
41 27
3 52
50th percentile speed
33 28
6 53
85th percentile speed
36 29
3 54
10 mph pace speed
28 -
37 30
6 55
% in pace speed
89 31
10 56
Skewness index
0.889
32 15
57 33
17 58
34 17
59 35
12 60
36 7
61 37
5 62
38 3
63 39
2 64
40 1
65 41
1 66
42 67
43 68
44 69
T O T A L
110
ANALYSIS INFORMATION
Segment Length (mi.):
0.52 ADT:
5,210
Count Date:
5/19/22
Number of accidents:
3 Time period:
3 years
Calc. Crash Rate =
1.01 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2Ln+ Bikes
Terrain:
Curved-Rolling
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 36mph, a crash rate 2x of the State District Average, it is the Engineer's judgement to lower the posted speed limit to 30mph. No significant changes have occurrred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 30mph
_ is hereby determined to be reasonable for
the above street segment.
0 2
4 6
8 10
12 14
16 18
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
East Avenue between Silverado Trl (S) & East First St
Posted Limit:
25mph
Speed
Number
Speed
Number
Direction:
NB - SB
Recorder:
EBM
15 40
Date:
1/18/24
Day:
Thursday
16 41
Begin Time:
10:25am
End Time:
11:30am
17 42
Weather:
Clear Dry Cold
Land Use:
Res / Sch
18 43
19 44
Summary Statistics
20 3
45 Total Observed
105
21 8
46 Speed Range
20 -
31 22
10 47
50th percentile speed
25 23
11 48
85th percentile speed
27 24
13 49
10 mph pace speed
21 -
30 25
15 50
% in pace speed
96 26
16 51
Skewness index
1.000
27 14
52 28
6 53
29 4
54 30
4 55
31 1
56 32
57 33
58 34
59 35
60 36
61 37
62 38
63 39
64 T O T A L
105
ANALYSIS INFORMATION
Segment Length (mi.):
0.34 ADT:
2,568
Count Date:
5/19/2022
Number of accidents:
2 Time period:
3 years
Calc. Crash Rate =
2.09 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2Ln
Terrain:
Hills
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 27mph, adjacent Elementary School, it appears reasonable to retain the posted speed limit of 25mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable
for the above street segment.
0 2
4 6
8 10
12 14
16 18
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
East Avenue between East First St & Silverado Trail (N) Posted Limit:
25mph
Speed
Number
Speed
Number
Direction:
NB - SB
Recorder:
EBM
20 1
45 Date:
1/18/24
Day:
Thursday
21 46
Begin Time:
9:15am
End Time:
10:25am
22 47
Weather:
Clear Dry Cold
Land Use:
Residential
23 4
48 24
7 49
Summary Statistics
25 14
50 Total Observed
102
26 17
51 Speed Range
20 -
32 27
15 52
50th percentile speed
27 28
16 53
85th percentile speed
29 29
14 54
10 mph pace speed
23 -
32 30
8 55
% in pace speed
99 31
5 56
Skewness index
1.000
32 1
57 33
58 34
59 35
60 36
61 37
62 38
63 39
64 40
65 41
66 42
67 43
68 44
69 T O T A L
102
ANALYSIS INFORMATION
Segment Length (mi.):
0.65 ADT:
2,573
Count Date:
5/25/22
Number of accidents:
2 Time period:
3 years
Calc. Crash Rate =
1.09 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
40 Configuration:
2Ln+ TrCalm
Terrain:
Rolling
Parking Conditions:
Both
Sidewalk:
Discontinuous
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 29mph, narrowed travel lanes for traffic calming, it appears reasonable to retain the existing posted speed of 25mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable
for the above street segment.
0 2
4 6
8 10
12 14
16 18
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
First Street between California Blvd & Jefferson St
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
EB
Recorder:
JCL
20 45
Date:
5/29/2025
Day:
Thursday
21 46
Begin Time:
1:50 PM
End Time:
2:20 PM
22 47
Weather:
Clear Warm Dry
Land Use:
Residential
23 48
24 49
Summary Statistics
25 6
50 Total Observed
117
26 8
51 Speed Range
25 -
37 27
15 52
50th percentile speed
30 28
15 53
85th percentile speed
32 29
12 54
10 mph pace speed
25 -
34 30
18 55
% in pace speed
94 31
18 56
Skewness index
1.000
32 9
57 33
7 58
34 2
59 35
4 60
36 2
61 37
1 62
38 63
39 64
40 65
41 66
42 67
43 68
44 69
T O T A L
117
ANALYSIS INFORMATION
Segment Length (mi.):
0.39 ADT:
5,139
Count Date:
4/14/2022
Number of accidents:
5 Time period:
5 years
Calc. Crash Rate =
1.37 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
40 Configuration:
2 Lanes
Terrain:
Flat
Parking Conditions:
Both
Sidewalk:
Both
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 32mph, this section is identified on the Countywide High Injury Network and a crash rate 3x the State District Average, this also section meets the definition of Residence District, it is the Engineer's judgement to lower the posted speed limit to 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
First Street between Soscol Ave & Silverado Trail
Posted Limit:
25 MPH
Speed
Number
Speed
Number
Direction:
WB-EB
Recorder:
JCL
15 40
Date:
5/29/2025
Day:
Thursday
16 41
Begin Time:
4:00 PM
End Time:
4:50 PM
17 42
Weather:
Clear Warm Dry
Land Use:
Commercial
18 43
19 44
Summary Statistics
20 10
45 Total Observed
113
21 5
46 Speed Range
20 -
30 22
11 47
50th percentile speed
25 23
10 48
85th percentile speed
26 24
17 49
10 mph pace speed
20 -
29 25
27 50
% in pace speed
98 26
17 51
Skewness index
0.750
27 7
52 28
5 53
29 2
54 30
2 55
31 56
32 57
33 58
34 59
35 60
36 61
37 62
38 63
39 64
T O T A L
113
ANALYSIS INFORMATION
Segment Length (mi.):
0.41 ADT:
7,921
Count Date:
5/15/2025
Number of accidents:
9 Time period:
5 years
Calc. Crash Rate =
1.52 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
40 Configuration:
2 Lanes
Terrain:
Rolling
Parking Conditions:
Discontinuous
Sidewalk:
Both
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 26mph, it appears reasonable to retain the existing posted speed limit.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph_
_ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
30 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Freeway Drive between Old Sonoma Rd & Laurel St
Posted Limit:
35mph
Speed
Number
Speed
Number
Direction:
NB - SB
Recorder:
EBM
20 45
Date:
1/18/24
Day:
Thursday
21 46
Begin Time:
2:35pm
End Time:
3:30pm
22 47
Weather:
Clear Dry Cold
Land Use:
Commercial
23 48
24 49
Summary Statistics
25 1
50 Total Observed
112
26 1
51 Speed Range
25 -
39 27
2 52
50th percentile speed
34 28
1 53
85th percentile speed
37 29
3 54
10 mph pace speed
29 -
38 30
11 55
% in pace speed
95 31
6 56
Skewness index
0.889
32 5
57 33
13 58
34 19
59 35
14 60
36 16
61 37
11 62
38 8
63 39
1 64
40 65
41 66
42 67
43 68
44 69
T O T A L
112
ANALYSIS INFORMATION
Segment Length (mi.):
0.4 ADT:
9,254
Count Date:
6/7/22
Number of collisions:
5 Time period:
3 years
Calc. Crash Rate =
1.23 Fatal +Injury Crashes per Million Vehicle-Miles
Street Width (ft):
30 Configuration:
2Ln + Bikes
Terrain:
Flat
Parking Conditions:
None
Sidewalk:
West Only
Class:
Local
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 37mph, a crash rate 3x the State District Average, it is the Engineer's judgement to lower the posted speed limit to 30mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 30mph
__ is hereby determined to be reasonable
for the above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Freeway Drive between Laurel St & First St
Posted Limit:
35mph
Speed
Number
Speed
Number
Direction:
NB - SB
Recorder:
EBM
20 45
Date:
1/18/24
Day:
Thursday
21 46
Begin Time:
1:45pm
End Time:
2:30pm
22 47
Weather:
Clear Dry Cold
Land Use:
Commercial
23 48
24 49
Summary Statistics
25 3
50 Total Observed
130
26 4
51 Speed Range
25 -
39 27
3 52
50th percentile speed
32 28
15 53
85th percentile speed
34 29
10 54
10 mph pace speed
28 -
37 30
15 55
% in pace speed
91 31
14 56
Skewness index
0.889
32 19
57 33
19 58
34 10
59 35
7 60
36 5
61 37
4 62
38 1
63 39
1 64
40 65
41 66
42 67
43 68
44 69
T O T A L
130
ANALYSIS INFORMATION
Segment Length (mi.):
0.51 ADT:
8,856
Count Date:
5/12/22
Number of collisions:
6 Time period:
3 years
Calc. Crash Rate =
1.21 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2Ln, Bike CL4
Terrain:
Flat Curve
Parking Conditions:
Dicontinuous
Sidewalk:
West Only
Class:
Local
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 34mph, adjacent Elementary School and Shopping Outlet Center, a crash rate 3x the State District Average, it is the Engineer's judgement to lower the posted speed limit to 30mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 30mph
__ is hereby determined to be reasonable
for the above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Hagen Road between Silverado Trl & East City Limits
Posted Limit:
35 MPH
Speed
Number
Speed
Number
Direction:
WB-EB
Recorder:
JCL
25 50
Date:
5/14/2025
Day:
Wednesday
26 51
Begin Time:
2:50 PM
End Time:
3:30 PM
27 52
Weather:
Clear Dry Warm
Land Use:
Residential
28 53
29 54
Summary Statistics
30 3
55 Total Observed
128
31 9
56 Speed Range
30 -
42 32
15 57
50th percentile speed
35 33
9 58
85th percentile speed
38 34
12 59
10 mph pace speed
31 -
40 35
16 60
% in pace speed
92 36
17 61
Skewness index
1.111
37 13
62 38
15 63
39 6
64 40
6 65
41 6
66 42
1 67
43 68
44 69
45 70
46 71
47 72
48 73
49 74
T O T A L
128
ANALYSIS INFORMATION
Segment Length (mi.):
0.44 ADT:
6,500
Count Date:
5/15/2025
Number of accidents:
0 Time period:
5 years
Calc. Crashes Rate =
0.00 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2 Lane
Terrain:
Rolling Curves
Parking Conditions:
Discontinuous
Sidewalk:
None
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 38mph, it is the Engineer's judgement to round down to 35mph and retain the existing posted speed limit.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 35mph
__ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 18
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Imola Avenue between Shurtleff Ave & East City Limit
Posted Limit:
35mph
Speed
Number
Speed
Number
Direction:
EB - WB
Recorder:
EBM
20 45
Date:
12/12/23
Day:
Tuesday
21 46
Begin Time:
1:45pm
End Time:
2:30pm
22 47
Weather:
Clear Dry Cool
Land Use:
Res / Com
23 48
24 1
49 Summary Statistics
25 6
50 Total Observed
117
26 6
51 Speed Range
24 -
37 27
10 52
50th percentile speed
31 28
11 53
85th percentile speed
33 29
8 54
10 mph pace speed
25 -
34 30
11 55
% in pace speed
90 31
18 56
Skewness index
0.889
32 16
57 33
14 58
34 5
59 35
5 60
36 4
61 37
2 62
38 63
39 64
40 65
41 66
42 67
43 68
44 69
T O T A L
117
ANALYSIS INFORMATION
Segment Length (mi.):
0.49 ADT:
5,279
Count Date:
5/19/22
Number of collisions:
2 Time period:
3 years
Calc. Crash Rate =
0.71 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2Ln
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 33mph, has a crash rate 2x the State District Average, this section is on the Napa Countywide High Injury Network, it is the Engineer's judgement to lower the posted speed limit to 30mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 30mph
_ is hereby determined to be reasonable for
the above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Jefferson Street between Lincoln Ave & Pueblo Ave
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
NB-SB
Recorder:
JCL
20 45
Date:
5/27/2025
Day:
Tuesday
21 46
Begin Time:
11:20 PM
End Time:
11:50 AM
22 47
Weather:
Clear Warm Dry
Land Use:
Sch / Comm
23 48
24 5
49 Summary Statistics
25 6
50 Total Observed
102
26 11
51 Speed Range
24 -
33 27
13 52
50th percentile speed
28 28
20 53
85th percentile speed
30 29
17 54
10 mph pace speed
24 -
33 30
15 55
% in pace speed
100
31 8
56 Skewness index
1.000
32 6
57 33
1 58
34 59
35 60
36 61
37 62
38 63
39 64
40 65
41 66
42 67
43 68
44 69
T O T A L
102
ANALYSIS INFORMATION
Segment Length (mi.):
0.51 ADT:
19,799
Count Date:
5/15/2025
Number of accidents:
22 Time period:
5 years
Calc. Crashes Rate =
1.19 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
4 Ln + TLWTL
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Both
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 30mph, it appears reasonable to retain the posted speed limit of 30mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of ___ 30mph
___ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Jefferson Street between Pueblo Ave & Trancas St
Posted Limit:
30 MPH
Speed Number Speed Number
Direction:
NB-SB
Recorder:
JCL
20 45
Date:
5/27/2025
Day:
Thursday
21 46
Begin Time:
10:30 AM
End Time:
11:00 AM
22 47
Weather:
Clear Dry Cool
Land Use:
Commercial
23 48
24 49
Summary Statistics
25 50
Total Observed 109 26
2 51
Speed Range 26 - 34 27
4 52
50th percentile speed 30 28
8 53
85th percentile speed 32 29
17 54
10 mph pace speed 26 - 35 30
25 55
% in pace speed 100 31
19 56
Skewness index 1.200 32
18 57
33 14
58 34
2 59
35 60
36 61
37 62
38 63
39 64
40 65
41 66
42 67
43 68
44 69
T O T A L 109
ANALYSIS INFORMATION
Segment Length (mi.):
0.51 ADT:
20,440
Count Date:
5/15/2025
Number of accidents:
17 Time period:
5 years
Calc. Crash Rate =
0.89 accidents per million vehicle-miles
Street Width (ft):
64 Configuration:
4 Lns + TWLTL
Terrain:
Flat
Parking Conditions:
None
Sidewalk:
Both
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 32mph, it appears reasonable to retain the posted speed limit of 30mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 30mph
__ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
30 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Jefferson Street between Trancas St & Trower Ave
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
SB-NB
Recorder:
JCL
20 45
Date:
5/16/2025
Day:
Friday
21 46
Begin Time:
10:00 AM
End Time:
10:50 AM
22 47
Weather:
Clear Warm Dry
Land Use:
Residential
23 48
24 1
49 Summary Statistics
25 3
50 Total Observed
105
26 1
51 Speed Range
24 -
35 27
52 50th percentile speed
31 28
7 53
85th percentile speed
32 29
20 54
10 mph pace speed
25 -
34 30
18 55
% in pace speed
97 31
17 56
Skewness index
0.800
32 24
57 33
10 58
34 2
59 35
2 60
36 61
37 62
38 63
39 64
40 65
41 66
42 67
43 68
44 69
T O T A L
105
ANALYSIS INFORMATION
Segment Length (mi.):
0.81 ADT:
15,659
Count Date:
5/15/2025
Number of accidents:
15 Time period:
5 years
Calc. Crash Rate =
0.65 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
64 Configuration:
2Ln, M, 2B
Terrain:
Flat
Parking Conditions:
Both
Sidewalk:
Both
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 32mph, it appears reasonable to retain the existing posted speed limit of 30mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 30mph_
_ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
30 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Jefferson Street between Trower Ave & Salvador Ave
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
NB-SB
Recorder:
JCL
20 45
Date:
5/8/2025
Day:
Thursday
21 46
Begin Time:
10:50 AM
End Time:
11:40 AM
22 47
Weather:
Dry Warm Cool
Land Use:
Residential
23 48
24 1
49 Summary Statistics
25 2
50 Total Observed
110
26 3
51 Speed Range
24 -
38 27
5 52
50th percentile speed
31 28
6 53
85th percentile speed
34 29
7 54
10 mph pace speed
27 -
36 30
14 55
% in pace speed
91 31
17 56
Skewness index
1.111
32 21
57 33
12 58
34 7
59 35
5 60
36 6
61 37
3 62
38 1
63 39
64 40
65 41
66 42
67 43
68 44
69 T O T A L
110
ANALYSIS INFORMATION
Segment Length (mi.):
0.8 ADT:
9,509
Count Date:
5/13/2025
Number of accidents:
4 Time period:
5 years
Calc. Crash Rate =
0.29 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2 Ln + 2 Bk
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th perentile speed of 34mph, it is the Engineer's judgement to round down to 30mph and retain the existing posted speed limit.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 30mph
__ is hereby determined to be reasonable for the above
street segment.
0 5
10 15
20 25
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Kaiser Road between West City limit & Hwy 221
Posted Limit:
40 MPH
Speed
Number
Speed
Number
Direction:
EB-WB
Recorder:
JCL
25 50
Date:
6/5/2025
Day:
Thursday
26 51
Begin Time:
10:00 AM
End Time:
10:40 AM
27 52
Weather:
Cloudy Cool Dry
Land Use:
Commercial
28 53
29 54
Summary Statistics
30 55
Total Observed
125
31 56
Speed Range
32 -
43 32
4 57
50th percentile speed
37 33
3 58
85th percentile speed
41 34
9 59
10 mph pace speed
33 -
42 35
16 60
% in pace speed
96 36
13 61
Skewness index
1.143
37 18
62 38
14 63
39 17
64 40
11 65
41 12
66 42
7 67
43 1
68 44
69 45
70 46
71 47
72 48
73 49
74 T O T A L
125
ANALYSIS INFORMATION
Segment Length (mi.):
0.52 ADT:
1,400
Count Date:
5/15/2025
Number of accidents:
1 Time period:
5 years
Calc. Crash Rate =
0.75 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
82 Configuration:
4 Lns w/Median
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Northside
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 41mph, a crash rate higher than State District Average, it is the Engineer's judgement to lower the posted speed limit to 35mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 35mph
__ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Kansas Avenue between Soscol Ave & Shurtleff Ave
Posted Limit:
25mph
Speed
Number
Speed
Number
Direction:
EB - WB
Recorder:
EBM
15 40
Date:
12/11/23
Day:
Monday
16 41
Begin Time:
3:45pm
End Time:
4:30pm
17 42
Weather:
Clear Dry Cool
Land Use:
Res / Comm
18 1
43 19
2 44
Summary Statistics
20 5
45 Total Observed
125
21 6
46 Speed Range
18 -
30 22
13 47
50th percentile speed
25 23
13 48
85th percentile speed
27 24
15 49
10 mph pace speed
20 -
29 25
19 50
% in pace speed
97 26
18 51
Skewness index
0.857
27 19
52 28
10 53
29 3
54 30
1 55
31 56
32 57
33 58
34 59
35 60
36 61
37 62
38 63
39 64
T O T A L
125
ANALYSIS INFORMATION
Segment Length (mi.):
0.59 ADT:
956
Count Date:
5/19/22
Number of collisions:
8 Time period:
3 years
Calc. Crash Rate =
12.95 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
40 Configuration:
2Ln
Terrain:
Flat
Parking Conditions:
Both
Sidewalk:
Both
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 27mph, it's reasonable to retain the posted speed limit of 25mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 25mph
_ is hereby determined to be reasonable for
the above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Kilburn Avenue between Laurel St & Freeway Dr
Posted Limit:
25 MPH
Speed
Number
Speed
Number
Direction:
EB-WB
Recorder:
JCL
15 40
Date:
5/28/2025
Day:
Wednesday
16 41
Begin Time:
1:50 PM
End Time:
2:30 PM
17 42
Weather:
Clear Warm Dry
Land Use:
Sch / Res
18 43
19 1
44 Summary Statistics
20 4
45 Total Observed
104
21 8
46 Speed Range
19 -
31 22
6 47
50th percentile speed
25 23
17 48
85th percentile speed
27 24
14 49
10 mph pace speed
20 -
29 25
17 50
% in pace speed
94 26
16 51
Skewness index
1.000
27 6
52 28
7 53
29 3
54 30
3 55
31 2
56 32
57 33
58 34
59 35
60 36
61 37
62 38
63 39
64 T O T A L
104
ANALYSIS INFORMATION
Segment Length (mi.):
0.81 ADT:
1,696
Count Date:
5/20/2015
Number of accidents:
2 Time period:
5 years
Calc. Crash Rate =
0.80 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
40 Configuration:
2 Lanes
Terrain:
Flat
Parking Conditions:
Both
Sidewalk:
Both
Class:
Local
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile of 27mph, this section meets the definition of Residence District, it appears reasonable to retain the existing posted speed limit of 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 18
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Laurel Street between Griggs Ln & Freeway Dr
Posted Limit:
25 MPH
Speed
Number
Speed
Number
Direction:
WB-EB
Recorder:
JCL
15 40
Date:
5/28/2025
Day:
Wednesday
16 41
Begin Time:
3:00PM
End Time:
3:50 PM
17 42
Weather:
Clear Warm Dry
Land Use:
Residential
18 3
43 19
3 44
Summary Statistics
20 8
45 Total Observed
112
21 7
46 Speed Range
18 -
29 22
9 47
50th percentile speed
24 23
10 48
85th percentile speed
27 24
16 49
10 mph pace speed
20 -
29 25
17 50
% in pace speed
95 26
11 51
Skewness index
1.000
27 13
52 28
10 53
29 5
54 30
55 31
56 32
57 33
58 34
59 35
60 36
61 37
62 38
63 39
64 T O T A L
112
ANALYSIS INFORMATION
Segment Length (mi.):
0.53 ADT:
1,500
Count Date:
5/15/2025
Number of accidents:
0 Time period:
5 years
Calc. Crash Rate =
0.00 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
40 Configuration:
2 Lanes
Terrain:
Flat
Parking Conditions:
Both
Sidewalk:
Continuous
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 27mph, this section meets the definition of a Residence District, it appears reasonable to retain the existing posted speed limit of 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 18
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Lincoln Avenue between Solano Ave & Jefferson St
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
WB-EB
Recorder:
JCL
15 40
Date:
6/5/2025
Day:
Thursday
16 41
Begin Time:
3:40 PM
End Time:
4:10 PM
17 42
Weather:
Clear Warm Dry
Land Use:
Commercial
18 43
19 44
Summary Statistics
20 45
Total Observed
139
21 1
46 Speed Range
21 -
35 22
1 47
50th percentile speed
30 23
48 85th percentile speed
32 24
1 49
10 mph pace speed
26 -
35 25
4 50
% in pace speed
95 26
5 51
Skewness index
0.857
27 7
52 28
9 53
29 17
54 30
28 55
31 25
56 32
24 57
33 10
58 34
2 59
35 5
60 36
61 37
62 38
63 39
64 T O T A L
139
ANALYSIS INFORMATION
Segment Length (mi.):
0.59 ADT:
19,720
Count Date:
5/15/2025
Number of accidents:
23 Time period:
5 years
Calc. Crash Rate =
1.08 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
64 Configuration:
4 Lanes
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on an 85th percentile speed of 32mph, it appears reasonable to retain the posted speed limit of 30mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 30mph
__ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
30 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Lincoln Avenue between Jefferson St & Soscol Ave
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
EB-WB
Recorder:
JCL
20 45
Date:
5/28/2025
Day:
Tuesday
21 46
Begin Time:
9:30 AM
End Time:
10:00 AM
22 47
Weather:
Cloudy Dry Cool
Land Use:
Com / Res
23 48
24 49
Summary Statistics
25 1
50 Total Observed
109
26 1
51 Speed Range
25 -
34 27
4 52
50th percentile speed
31 28
16 53
85th percentile speed
32 29
13 54
10 mph pace speed
25 -
34 30
16 55
% in pace speed
100
31 22
56 Skewness index
0.800
32 20
57 33
10 58
34 6
59 35
60 36
61 37
62 38
63 39
64 40
65 41
66 42
67 43
68 44
69 T O T A L
109
ANALYSIS INFORMATION
Segment Length (mi.):
0.59 ADT:
18,566
Count Date:
5/15/2025
Number of accidents:
26 Time period:
5 years
Calc. Crash Rate =
1.30 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
64 Configuration:
4Lns +bikes
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on an 85th percentile speed of 32mph, it appears reasonable to retain the posted speed limit of 30mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 30mph
__ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Lincoln Avenue between Soscol Ave & Silverado Tr
Posted Limit:
35 MPH
Speed
Number
Speed
Number
Direction:
EB-WB
Recorder:
JCL
25 50
Date:
5/28/2025
Day:
Wednesday
26 51
Begin Time:
10:30 AM
End Time:
11:00 AM
27 52
Weather:
Clear Cool Dry
Land Use:
Commercial
28 53
29 1
54 Summary Statistics
30 5
55 Total Observed
130
31 2
56 Speed Range
29 -
39 32
16 57
50th percentile speed
35 33
12 58
85th percentile speed
37 34
17 59
10 mph pace speed
30 -
39 35
28 60
% in pace speed
99 36
27 61
Skewness index
1.000
37 7
62 38
13 63
39 2
64 40
65 41
66 42
67 43
68 44
69 45
70 46
71 47
72 48
73 49
74 T O T A L
130
ANALYSIS INFORMATION
Segment Length (mi.):
0.48 ADT:
13,424
Count Date:
5/15/2025
Number of accidents:
7 Time period:
5 years
Calc. Crash Rate =
0.60 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
4 Lanes
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on an 85th percentile speed of 37mph, this section is identified on both the Citywide and Countywide High Injury Networks, this section is contiguous to a 30mph section, it is the Engineer's judgement to lower the posted speed limit to 30mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 30mph
__ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
30 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Linda Vista Avenue between Lone Oak Ave & West Pueblo Ave Posted Limit:
25 MPH
Speed
Number
Speed
Number
Direction:
NB-SB
Recorder:
JCL
15 40
Date:
5/14/2025
Day:
Wednesday
16 41
Begin Time:
11:00 AM
End Time:
11:50 AM
17 42
Weather:
Clear Dry Cool
Land Use:
Res / Sch
18 1
43 19
1 44
Summary Statistics
20 5
45 Total Observed
117
21 4
46 Speed Range
18 -
31 22
5 47
50th percentile speed
25 23
13 48
85th percentile speed
29 24
12 49
10 mph pace speed
21 -
30 25
18 50
% in pace speed
92 26
17 51
Skewness index
1.111
27 12
52 28
11 53
29 8
54 30
8 55
31 2
56 32
57 33
58 34
59 35
60 36
61 37
62 38
63 39
64 T O T A L
117
ANALYSIS INFORMATION
Segment Length (mi.):
0.38 ADT:
3,915
Count Date:
4/5/2022
Number of accidents:
1 Time period:
5 years
Calc. Crash Rate =
0.37 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
40 Configuration:
2 Lanes
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 29mph, it is the Engineer's judgement to round down to 25mph and retain the posted speed limit.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Linda Vista Avenue between Redwood Rd & Trower Ave
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
NB-SB
Recorder:
JCL
15 40
Date:
5/15/2025
Day:
Wednesday
16 41
Begin Time:
9:30 AM
End Time:
10:30 AM
17 42
Weather:
Clear Dry Cool
Land Use:
Res / Sch
18 43
19 44
Summary Statistics
20 45
Total Observed
105
21 1
46 Speed Range
21 -
35 22
1 47
50th percentile speed
30 23
1 48
85th percentile speed
32 24
3 49
10 mph pace speed
25 -
34 25
3 50
% in pace speed
93 26
4 51
Skewness index
0.750
27 10
52 28
11 53
29 12
54 30
18 55
31 14
56 32
12 57
33 9
58 34
5 59
35 1
60 36
61 37
62 38
63 39
64 T O T A L
105
ANALYSIS INFORMATION
Segment Length (mi.):
0.6 ADT:
3,089
Count Date:
5/15/2025
Number of accidents:
1 Time period:
5 years
Calc. Crash Rate =
0.30 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2 Lanes
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 32mph, this section meets the definition of Residence District, it is the Engineer's judgement to lower the poster speed limit to 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of ___ 25mph
___ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
McKinstry Street between First St & Soscol Ave
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
NB-SB
Recorder:
JCL
15 40
Date:
6/3/2025
Day:
Tuesday
16 41
Begin Time:
3:00 PM
End Time:
4:30 PM
17 42
Weather:
Clear Warm Dry
Land Use:
Comm / Park
18 43
19 2
44 Summary Statistics
20 15
45 Total Observed
110
21 8
46 Speed Range
19 -
33 22
11 47
50th percentile speed
24 23
9 48
85th percentile speed
27 24
10 49
10 mph pace speed
19 -
28 25
19 50
% in pace speed
92 26
15 51
Skewness index
1.200
27 5
52 28
7 53
29 1
54 30
3 55
31 3
56 32
57 33
2 58
34 59
35 60
36 61
37 62
38 63
39 64
T O T A L
110
ANALYSIS INFORMATION
Segment Length (mi.):
0.3 ADT:
1,391
Count Date:
5/25/2022
Number of accidents:
1 Time period:
5 years
Calc. Crash Rate =
1.31 Fatal + Injury crashes per million vehicle-miles
Street Width (ft):
40 Configuration:
2 Lanes
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 27mph, a crash rate 3x the State District Average, the roadway divides a City Park, it is the Engineer's judgement to lower the posted speed limit to 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable for the above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Napa Valley Corporate Drive - South City Limit to NV Corporate Way Posted Limit:
40 MPH
Speed
Number
Speed
Number
Direction:
NB - SB
Recorder:
JCL
25 50
Date:
4/8/2026
Day:
Wednesday
26 1
51 Begin Time:
2:20 PM
End Time:
3:10 PM
27 1
52 Weather:
Clear, Warm
Land Use:
Commercial
28 2
53 29
3 54
Summary Statistics
30 6
55 Total Observed
131
31 6
56 Speed Range
26 -
45 32
9 57
50th percentile speed
36 33
8 58
85th percentile speed
39 34
6 59
10 mph pace speed
30 -
39 35
23 60
% in pace speed
80 36
10 61
Skewness index
1 37
12 62
38 16
63 39
9 64
40 5
65 41
66 42
5 67
43 4
68 44
2 69
45 3
70 46
71 47
72 48
73 49
74 T O T A L
131
ANALYSIS INFORMATION
Segment Length (mi.):
0.36 ADT:
6,676
Count Date:
2023
Number of accidents:
2 Time period:
5 years
Calc. Crash Rate =
0.46 Fatal + Injury crashes per million vehicle-miles
Street Width (ft):
75 Configuration:
4Lns,M,2 Bk
Terrain:
Curve, Hill
Parking Conditions:
None
Sidewalk:
discontinuous
Class:
Minor Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 39mph, adjacent Resort Property, it is the Engineer's judgement to lower the posted speed limit to 35mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 35mph
___ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Old Sonoma Road between West City limit & Foster Rd
Posted Limit:
35 MPH
Speed
Number
Speed
Number
Direction:
WB-EB
Recorder:
JCL
20 45
Date:
5/27/2025
Day:
Tuesday
21 46
Begin Time:
2:50 PM
End Time:
3:40 PM
22 47
Weather:
Clear Warm Dry
Land Use:
Res / Comm
23 48
24 49
Summary Statistics
25 50
Total Observed
117
26 1
51 Speed Range
26 -
39 27
52 50th percentile speed
35 28
1 53
85th percentile speed
37 29
54 10 mph pace speed
30 -
39 30
3 55
% in pace speed
98 31
3 56
Skewness index
0.800
32 8
57 33
10 58
34 23
59 35
18 60
36 30
61 37
14 62
38 4
63 39
2 64
40 65
41 66
42 67
43 68
44 69
T O T A L
117
ANALYSIS INFORMATION
Segment Length (mi.):
0.44 ADT:
8,818
Count Date:
5/14/2025
Number of accidents:
3 Time period:
5 years
Calc. Crash Rate =
0.42 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2 Lanes
Terrain:
Hill
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 37mph, it appears reasonable to retain the existing posted speed limit of 35mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 35mph
__ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
30 35
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Old Sonoma Road between Foster Rd & Jefferson St
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
WB-EB
Recorder:
EM
20 45
Date:
5/15/2025
Day:
Thursday
21 46
Begin Time:
2:45 PM
End Time:
3:45 PM
22 47
Weather:
Clear Dry Warm
Land Use:
Res / Comm
23 48
24 1
49 Summary Statistics
25 50
Total Observed
102
26 3
51 Speed Range
24 -
37 27
4 52
50th percentile speed
31 28
6 53
85th percentile speed
33 29
13 54
10 mph pace speed
27 -
36 30
14 55
% in pace speed
95 31
19 56
Skewness index
1.000
32 16
57 33
11 58
34 7
59 35
4 60
36 3
61 37
1 62
38 63
39 64
40 65
41 66
42 67
43 68
44 69
T O T A L
102
ANALYSIS INFORMATION
Segment Length (mi.):
0.72 ADT:
9,500
Count Date:
5/14/2025
Number of accidents:
4 Time period:
5 years
Calc. Crash Rate =
0.32 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2-3 Lanes
Terrain:
Flat + Hill
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 33mph, this section is identified on the Countywide High Injury Network, it is the Engineer's judgement to lower posted speed limit to 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Old Soscol Way between Soscol Ave & Trancas St
Posted Limit:
25mph
Speed
Number
Speed
Number
Direction:
NB - SB
Recorder:
EBM
15 40
Date:
12/11/23
Day:
Monday
16 41
Begin Time:
12:45pm
End Time:
1:30pm
17 42
Weather:
Clear Dry Cool
Land Use:
Commercial
18 43
19 44
Summary Statistics
20 1
45 Total Observed
113
21 1
46 Speed Range
20 -
37 22
0 47
50th percentile speed
30 23
1 48
85th percentile speed
32 24
3 49
10 mph pace speed
26 -
35 25
2 50
% in pace speed
91 26
5 51
Skewness index
0.889
27 11
52 28
9 53
29 17
54 30
19 55
31 15
56 32
13 57
33 7
58 34
5 59
35 2
60 36
1 61
37 1
62 38
63 39
64 T O T A L
113
ANALYSIS INFORMATION
Segment Length (mi.):
0.22 ADT:
4,250
Count Date:
4/21/22
Number of accidents:
4 Time period:
3 years
Calc. Crash Rate =
3.91 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2Ln+ Bike
Terrain:
Flat Curve
Parking Conditions:
Discontinuous
Sidewalk:
Both
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 32mph, a crash rate over 4x the State District Average; it is the Engineer's judegment to retain the posted speed limit of 25mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 25mph
_ is hereby determined to be reasonable for
the above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Partrick Road between West City Limit & Browns Valley Rd Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
WB-EB
Recorder:
JCL
20 45
Date:
6/3/2025
Day:
Tuesday
21 46
Begin Time:
10:00 AM
End Time:
11:30 AM
22 47
Weather:
Clear Cool Dry
Land Use:
Residential
23 1
48 24
9 49
Summary Statistics
25 10
50 Total Observed
118
26 12
51 Speed Range
23 -
36 27
11 52
50th percentile speed
29 28
8 53
85th percentile speed
32 29
14 54
10 mph pace speed
24 -
33 30
13 55
% in pace speed
91 31
13 56
Skewness index
1.000
32 12
57 33
5 58
34 4
59 35
5 60
36 1
61 37
62 38
63 39
64 40
65 41
66 42
67 43
68 44
69 T O T A L
118
ANALYSIS INFORMATION
Segment Length (mi.):
0.53 ADT:
667
Count Date:
5/12/2022
Number of accidents:
0 Time period:
5 years
Calc. Crash Rate =
0.00 Fatal + Injury crashes per million vehicle-miles
Street Width (ft):
40 Configuration:
2 Lanes
Terrain:
Flat + Curves
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 32mph, it appears reasonable to retain the posted speed.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 30mph
___ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Partrick Road between Browns Valley Rd w & Browns Valley Rd e Posted Limit:
35 MPH
Speed
Number
Speed
Number
Direction:
WB-EB
Recorder:
JCL
25 50
Date:
6/3/2025
Day:
Tuesday
26 51
Begin Time:
1:45 PM
End Time:
2:50 PM
27 1
52 Weather:
Clear Warm Dry
Land Use:
Residential
28 4
53 29
3 54
Summary Statistics
30 1
55 Total Observed
115
31 3
56 Speed Range
27 -
40 32
12 57
50th percentile speed
34 33
20 58
85th percentile speed
37 34
14 59
10 mph pace speed
31 -
40 35
20 60
% in pace speed
92 36
16 61
Skewness index
1.111
37 4
62 38
7 63
39 6
64 40
4 65
41 66
42 67
43 68
44 69
45 70
46 71
47 72
48 73
49 74
T O T A L
115
ANALYSIS INFORMATION
Segment Length (mi.):
0.36 ADT:
2,831
Count Date:
5/5/2022
Number of accidents:
2 Time period:
5 years
Calc. Crash Rate =
1.08 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
40 Configuration:
2 Lns, 2 Bike
Terrain:
Flat
Parking Conditions:
None
Sidewalk:
Both
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 37mph, a crash rate 2x of the State District Average, this section is between posted 30mph speed limits, it is the Engineer's judgement to lower the posted speed limit to 30mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 30mph
__ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Redwood Road between Dry Creek Rd & Solano Ave
Posted Limit:
35 MPH
Speed
Number
Speed
Number
Direction:
EB-WB
Recorder:
JCL
25 50
Date:
5/16/2025
Day:
Friday
26 51
Begin Time:
11:20 AM
End Time:
12:00 PM
27 1
52 Weather:
Clear Dry Cool
Land Use:
Residential
28 1
53 29
1 54
Summary Statistics
30 5
55 Total Observed
108
31 1
56 Speed Range
27 -
40 32
6 57
50th percentile speed
35 33
11 58
85th percentile speed
37 34
15 59
10 mph pace speed
31 -
40 35
21 60
% in pace speed
93 36
19 61
Skewness index
0.889
37 11
62 38
7 63
39 4
64 40
5 65
41 66
42 67
43 68
44 69
45 70
46 71
47 72
48 73
49 74
T O T A L
108
ANALYSIS INFORMATION
Segment Length (mi.):
0.95 ADT:
14,522
Count Date:
5/15/2025
Number of accidents:
22 Time period:
5 years
Calc. Crash Rate =
0.87 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
64 Configuration:
4-5 Lanes
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 37mph, a crash rate 2x of State District Average and 30% were Ped- Bike involved, this section is identified on both Citywide and Countywide High Injury Networks, it is the Engineer's judgement to lower the posted speed limit to 30mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 30mph
__ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Salvador Avenue Between Hwy 29 & East City Limits
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
WB-EB
Recorder:
JCL
15 40
Date:
5/8/2025
Day:
Thursday
16 41
Begin Time:
9:30 AM
End Time:
10:20 AM
17 42
Weather:
Cloudy Dry Cool
Land Use:
Res / Sch
18 43
19 1
44 Summary Statistics
20 1
45 Total Observed
108
21 1
46 Speed Range
19 -
38 22
47 50th percentile speed
31 23
48 85th percentile speed
33 24
2 49
10 mph pace speed
28 -
37 25
1 50
% in pace speed
91 26
1 51
Skewness index
1.000
27 2
52 28
10 53
29 16
54 30
17 55
31 9
56 32
16 57
33 15
58 34
5 59
35 5
60 36
3 61
37 2
62 38
1 63
39 64
T O T A L
108
ANALYSIS INFORMATION
Segment Length (mi.):
0.87 ADT:
6,357
Count Date:
5/14/2025
Number of accidents:
7 Time period:
5 years
Calc. Crash Rate =
0.69 Fatal + Inujry Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2 Lanes
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Both
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 33mph, a crash rate higher than the State District Average, this section is identified on the Countywide High Injury Network, it is the Engineer's judgement to lower the posted speed limit to 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 25mph
_ is hereby determined to be reasonable for the above
street segment.
0 2
4 6
8 10
12 14
16 18
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Saratoga Drive between Silverado Trl & Capitola Dr
Posted Limit:
25mph
Speed
Number
Speed
Number
Direction:
EB - WB
Recorder:
EBM
15 40
Date:
12/11/23
Day:
Monday
16 41
Begin Time:
3:00pm
End Time:
3:45pm
17 42
Weather:
Clear Dry Cool
Land Use:
Residential
18 43
19 44
Summary Statistics
20 3
45 Total Observed
113
21 1
46 Speed Range
20 -
36 22
0 47
50th percentile speed
29 23
7 48
85th percentile speed
31 24
3 49
10 mph pace speed
23 -
32 25
5 50
% in pace speed
90 26
9 51
Skewness index
0.667
27 12
52 28
16 53
29 14
54 30
15 55
31 16
56 32
5 57
33 3
58 34
2 59
35 1
60 36
1 61
37 62
38 63
39 64
T O T A L
113
ANALYSIS INFORMATION
Segment Length (mi.):
0.17 ADT:
2,928
Count Date:
5/19/22
Number of collisions:
0 Time period:
3 years
Calc. Crash Rate =
0.00 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
34 Configuration:
2Ln+ Bikes
Terrain:
Hill
Parking Conditions:
Discontinuous
Sidewalk:
Both
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 31mph, adjacent segements are posted 25mph, it is the Engineer's judgement to retain the posted speed limit of 25mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 25mph
_ is hereby determined to be reasonable for
the above street segment.
0 2
4 6
8 10
12 14
16 18
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Second Street between California Blvd & Jefferson St
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
WB
Recorder:
JCL
20 45
Date:
5/29/2025
Day:
Thursday
21 46
Begin Time:
2:50 PM
End Time:
3:40 PM
22 47
Weather:
Clear Warm Dry
Land Use:
Residential
23 48
24 49
Summary Statistics
25 7
50 Total Observed
120
26 7
51 Speed Range
25 -
37 27
11 52
50th percentile speed
30 28
11 53
85th percentile speed
32 29
15 54
10 mph pace speed
25 -
34 30
18 55
% in pace speed
95 31
15 56
Skewness index
1.000
32 18
57 33
8 58
34 4
59 35
3 60
36 2
61 37
1 62
38 63
39 64
40 65
41 66
42 67
43 68
44 69
T O T A L
120
ANALYSIS INFORMATION
Segment Length (mi.):
0.37 ADT:
2,201
Count Date:
4/14/2022
Number of accidents:
1 Time period:
5 years
Calc. Crash Rate =
0.67 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
40 Configuration:
2 Lanes
Terrain:
Flat
Parking Conditions:
Both
Sidewalk:
Both
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 32mph, a crash rate higher than State District Average, this section meets the definition of Residence District, it is the Engineer's judgement to lower the posted speed limit to 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Shetler Avenue between Soscol Ave and Par
r
ish Rd
Posted Limit:
30mph
Speed
Number
Speed
Number
Direction:
EB - WB
Recorder:
EBM
15 40
Date:
1/18/24
Day:
Thursday
16 41
Begin Time:
3:45pm
End Time:
4:45pm
17 42
Weather:
Clear Dry Cold
Land Use:
Residential
18 43
19 44
Summary Statistics
20 1
45 Total Observed
137
21 46
Speed Range
20 -
35 22
4 47
50th percentile speed
29 23
2 48
85th percentile speed
32 24
7 49
10 mph pace speed
24 -
33 25
9 50
% in pace speed
92 26
14 51
Skewness index
0.750
27 12
52 28
16 53
29 17
54 30
22 55
31 12
56 32
12 57
33 5
58 34
3 59
35 1
60 36
61 37
62 38
63 39
64 T O T A L
137
ANALYSIS INFORMATION
Segment Length (mi.):
0.48 ADT:
3,946
Count Date:
5/19/22
Number of collisions:
6 Time period:
3 years
Calc. Collision Rate =
2.89 collisions per million vehicle-miles
Street Width (ft):
40 Configuration:
2Ln
Terrain:
Rolling
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 32mph, a crash rate significantly higher than State District Average, this section meets the definition of a Residence District, it is the Engineer's judgement to lower the posted speed limit to 25mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable
for the above street segment.
0 5
10 15
20 25
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Solano Avenue between Trower Ave & Salvador Ave
Posted Limit:
40mph
Speed
Number
Speed
Number
Direction:
NB - SB
Recorder:
EBM
20 45
Date:
11/28/23
Day:
Tuesday
21 46
Begin Time:
10:20am
End Time:
10:30am
22 47
Weather:
Clear Dry Cool
Land Use:
Commercial
23 48
24 1
49 Summary Statistics
25 1
50 Total Observed
118
26 51
Speed Range
24 -
41 27
2 52
50th percentile speed
35 28
3 53
85th percentile speed
38 29
6 54
10 mph pace speed
32 -
41 30
2 55
% in pace speed
86 31
1 56
Skewness index
0.800
32 6
57 33
9 58
34 12
59 35
17 60
36 14
61 37
15 62
38 15
63 39
8 64
40 5
65 41
1 66
42 67
43 68
44 69
T O T A L
118
ANALYSIS INFORMATION
Segment Length (mi.):
0.73 ADT:
4,727
Count Date:
4/6/22
Number of collisions:
10 Time period:
3 years
Calc. Crash Rate =
2.65 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
34 Configuration:
2Ln+ Bikes
Terrain:
Flat
Parking Conditions:
None
Sidewalk:
West only
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 38mph, a crash rate 5x the State District Average, adjacent section at 35mph, it is the Engineer's recommendation to lower the posted speed limit to 35mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 35mph
_ is hereby determined to be reasonable for
the above street segment.
0 2
4 6
8 10
12 14
16 18
C 66200
Exp. 06/30/26
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Soscol Avenue between Lincoln Ave & Pueblo Ave
Posted Limit:
40mph
Speed
Number
Speed
Number
Direction:
NB - SB
Recorder:
EBM
25 50
Date:
1/18/24
Day:
Thursday
26 1
51 Begin Time:
11:30am
End Time:
12:15pm
27 52
Weather:
Clear Dry Cold
Land Use:
Residential
28 7
53 29
5 54
Summary Statistics
30 3
55 Total Observed
135
31 8
56 Speed Range
26 -
42 32
8 57
50th percentile speed
35 33
15 58
85th percentile speed
37 34
18 59
10 mph pace speed
30 -
39 35
17 60
% in pace speed
87 36
18 61
Skewness index
0.800
37 15
62 38
10 63
39 6
64 40
2 65
41 1
66 42
1 67
43 68
44 69
45 70
46 71
47 72
48 73
49 74
T O T A L
135
ANALYSIS INFORMATION
Segment Length (mi.):
0.53 ADT:
22,000
Count Date:
6/7/22
Number of collisions:
16 Time period:
3 years
Calc. Crash Rate =
1.25 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
61 Configuration:
5Ln + 2Bike
Terrain:
Flat
Parking Conditions:
None
Sidewalk:
Both
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 37mph, a crash rate 3x the the State District Average, this section is on both the Citywide and Countywide High Injury Networks, it is the Engineer's judgement to lower the posted speed limit to 35mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 35mph
__ is hereby determined to be reasonable
for the above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Soscol Avenue between Pueblo Ave & Trancas St
Posted Limit:
40mph
Speed
Number
Speed
Number
Direction:
NB - SB
Recorder:
EBM
20 45
Date:
12/5/23
Day:
Tuesday
21 46
Begin Time:
11:00am
End Time:
12:15pm
22 47
Weather:
Clear Dry Warm
Land Use:
Residential
23 48
24 49
Summary Statistics
25 2
50 Total Observed
106
26 1
51 Speed Range
25 -
39 27
2 52
50th percentile speed
35 28
4 53
85th percentile speed
37 29
2 54
10 mph pace speed
29 -
38 30
8 55
% in pace speed
91 31
5 56
Skewness index
0.444
32 8
57 33
8 58
34 10
59 35
19 60
36 16
61 37
15 62
38 5
63 39
1 64
40 65
41 66
42 67
43 68
44 69
T O T A L
106
ANALYSIS INFORMATION
Segment Length (mi.):
0.54 ADT:
21,523
Count Date:
6/9/22
Number of collisions:
20 Time period:
3 years
Calc. Crash Rate =
1.57 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
64 Configuration:
5Ln+ Bikes
Terrain:
Curved
Parking Conditions:
None
Sidewalk:
Both
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 37mph, this section is on both the Citywide and Countywide High Injury Networks, it is the Engineer's recommendation to lower the posted speed limit to 35mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 35mph
_ is hereby determined to be reasonable for
the above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
South Coombs Street between Imola Ave & Spruce St
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
NB-SB
Recorder:
JCL
20 45
Date:
5/27/2025
Day:
Tuesday
21 46
Begin Time:
4:00 PM
End Time:
4:30 PM
22 47
Weather:
Clear Warm Dry
Land Use:
Comm / Res
23 48
24 2
49 Summary Statistics
25 5
50 Total Observed
118
26 7
51 Speed Range
24 -
36 27
8 52
50th percentile speed
29 28
16 53
85th percentile speed
32 29
21 54
10 mph pace speed
24 -
33 30
21 55
% in pace speed
97 31
12 56
Skewness index
1.143
32 13
57 33
9 58
34 1
59 35
1 60
36 2
61 37
62 38
63 39
64 40
65 41
66 42
67 43
68 44
69 T O T A L
118
ANALYSIS INFORMATION
Segment Length (mi.):
0.33 ADT:
5,996
Count Date:
6/2/2022
Number of accidents:
2 Time period:
5 years
Calc. Crash Rate =
0.55 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
48 Configuration:
2 Lanes
Terrain:
Flat
Parking Conditions:
Both
Sidewalk:
Both
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on an 85th percentile speed of 32mph, a crash rate higher tha State District Average, this section meets the definition of Residence District, it is the Engineer's judgement to lower the posted speed limit to 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable for the above street segment. 0 5
10 15
20 25
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Third Street between California Blvd & Jefferson St
Posted Limit:
30mph
Speed
Number
Speed
Number
Direction:
EB - WB
Recorder:
EBM
20 45
Date:
11/27/23
Day:
Monday
21 1
46 Begin Time:
3:20pm
End Time:
4:00pm
22 1
47 Weather:
Clear Dry Cool
Land Use:
Residential
23 2
48 24
7 49
Summary Statistics
25 13
50 Total Observed
107
26 24
51 Speed Range
21 -
32 27
27 52
50th percentile speed
27 28
16 53
85th percentile speed
28 29
9 54
10 mph pace speed
23 -
32 30
3 55
% in pace speed
98 31
2 56
Skewness index
0.800
32 2
57 33
58 34
59 35
60 36
61 37
62 38
63 39
64 40
65 41
66 42
67 43
68 44
69 T O T A L
107
ANALYSIS INFORMATION
Segment Length (mi.):
0.36 ADT:
3,831
Count Date:
4/14/22
Number of collisions:
10 Time period:
3 years
Calc. Crash Rate =
6.62 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
40 Configuration:
2Ln
Terrain:
Flat
Parking Conditions:
Both
Sidewalk:
Both
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 28mph, a crash rate significantly higher than the State District Average, it is the Engineer's recommendation to lower the posted speed limit to 25mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 25mph
_ is hereby determined to be reasonable for
the above street segment.
0 5
10 15
20 25
30 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Third Street between Soscol Ave & Silverado Trail
Posted Limit:
30 mph
Speed
Number
Speed
Number
Direction:
Both
Recorder:
L.Sevilla
15 40
Date:
6/3/2025
Day:
Tuesday
16 41
Begin Time:
10:45a
End Time:
12:00p
17 42
Weather:
Clear Dry Cool
Land Use:
Mixed use
18 43
19 44
Summary Statistics
20 1
45 Total Observed
132
21 1
46 Speed Range
20 -
33 22
6 47
50th percentile speed
27 23
9 48
85th percentile speed
30 24
7 49
10 mph pace speed
22 -
31 25
16 50
% in pace speed
92 26
21 51
Skewness index
1.000
27 15
52 28
19 53
29 17
54 30
9 55
31 3
56 32
5 57
33 3
58 34
59 35
60 36
61 37
62 38
63 39
64 T O T A L
132
ANALYSIS INFORMATION
Segment Length (mi.):
0.35 ADT:
7,094
Count Date:
5/15/2025
Number of accidents:
5 Time period:
3 years
Calc. Crash Rate =
1.84 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
50 Configuration:
Terrain:
Flat
Parking Conditions:
Both
Sidewalk:
Both
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
2 Lns, 2 Bikes
Based on the 85th percentile speed of 30mph, a crash rate 4x the State District Average and 60% involving peds / bikes, this section is identified on the Countywide High Injury Network, it is the Engineer's judgement to lower the speed limit to 25 mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable for the
above street segment.
0 5
10 15
20 25
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Trancas Street between Big Ranch Rd & East City Limits
Posted Limit:
35mph
Speed
Number
Speed
Number
Direction:
EB - WB
Recorder:
EBM
20 45
Date:
12/5/23
Day:
Tuesday
21 46
Begin Time:
3:45pm
End Time:
4:30pm
22 47
Weather:
Clear Dry Warm
Land Use:
Commercial
23 48
24 49
Summary Statistics
25 50
Total Observed
117
26 3
51 Speed Range
26 -
38 27
5 52
50th percentile speed
33 28
11 53
85th percentile speed
37 29
5 54
10 mph pace speed
28 -
37 30
15 55
% in pace speed
90 31
6 56
Skewness index
0.889
32 8
57 33
12 58
34 8
59 35
13 60
36 13
61 37
14 62
38 4
63 39
64 40
65 41
66 42
67 43
68 44
69 T O T A L
117
ANALYSIS INFORMATION
Segment Length (mi.):
0.27 ADT:
15,079
Count Date:
4/21/22
Number of accidents:
8 Time period:
3 years
Calc. Crash Rate =
1.79 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
64 Configuration:
4-5Ln+Bike
Terrain:
Flat
Parking Conditions:
None
Sidewalk:
South only
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 37mph, a crash rate at 2x the State District Average, this section is on the Citywide High Injury Network, it is the Engineer's judgement to lower the posted speed limit to 30mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 30mph
_ is hereby determined to be reasonable for
the above street segment.
0 2
4 6
8 10
12 14
16 C 66200
Exp. 06/30/26
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Trower Avenue between Dry Creek Rd & Linda Vista Ave
Posted Limit:
35mph
Speed
Number
Speed
Number
Direction:
EB - WB
Recorder:
EBM
20 45
Date:
11/28/23
Day:
Tuesday
21 46
Begin Time:
11:40am
End Time:
1:30pm
22 47
Weather:
Clear Dry Cool
Land Use:
Residential
23 48
24 49
Summary Statistics
25 3
50 Total Observed
89 26
4 51
Speed Range
25 -
36 27
2 52
50th percentile speed
31 28
11 53
85th percentile speed
33 29
8 54
10 mph pace speed
26 -
35 30
13 55
% in pace speed
96 31
11 56
Skewness index
0.750
32 12
57 33
12 58
34 9
59 35
3 60
36 1
61 37
62 38
63 39
64 40
65 41
66 42
67 43
68 44
69 T O T A L
89 ANALYSIS INFORMATION
Segment Length (mi.):
0.49 ADT:
5,087
Count Date:
4/6/22
Number of collisions:
5 Time period:
3 years
Calc. Crash Rate =
1.83 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2Ln + Bikes
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 33mph, a crash rate 4x the State District Average, an adjacent segment posted at 30mph, it is the Engineer's judgement to lower the posted speed limit to 30mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 30mph
_ is hereby determined to be reasonable for
the above street segment.
0 2
4 6
8 10
12 14
C 66200
Exp. 06/30/26
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Trower Avenue Between Hwy 29 & Jefferson St
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
WB-EB
Recorder:
JCL
20 45
Date:
5/8/2025
Day:
Thursday
21 46
Begin Time:
2:00 PM
End Time:
3:00 PM
22 47
Weather:
Clear Warm Dry
Land Use:
Residential
23 48
24 49
Summary Statistics
25 50
Total Observed
115
26 1
51 Speed Range
26 -
39 27
2 52
50th percentile speed
33 28
2 53
85th percentile speed
35 29
6 54
10 mph pace speed
29 -
38 30
8 55
% in pace speed
95 31
15 56
Skewness index
1.000
32 17
57 33
18 58
34 19
59 35
10 60
36 8
61 37
6 62
38 2
63 39
1 64
40 65
41 66
42 67
43 68
44 69
T O T A L
115
ANALYSIS INFORMATION
Segment Length (mi.):
0.53 ADT:
8,334
Count Date:
5/13/2025
Number of accidents:
9 Time period:
5 years
Calc. Crash Rate =
1.12 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
64 Configuration:
3 Ln + 2Bk
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Both
Class:
Arterial
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on an 85th percentile speed of 35mph, a crash rate of 3x the State District Average, this section meets the definition of Residence District. it is the Engineer's judgement to lower the posted speed limit to 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 30mph
__ is hereby determined to be reasonable for
the above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
Walnut Street between Old Sonoma Rd & Laurel St
Posted Limit:
25mph
Speed
Number
Speed
Number
Direction:
NB - SB
Recorder:
EBM
15 1
40 Date:
11/27/23
Day:
Monday
16 41
Begin Time:
4:10pm
End Time:
5:00pm
17 42
Weather:
Clear Dry Cool
Land Use:
Commercial
18 2
43 19
1 44
Summary Statistics
20 11
45 Total Observed
147
21 12
46 Speed Range
15 -
29 22
12 47
50th percentile speed
24 23
15 48
85th percentile speed
27 24
20 49
10 mph pace speed
20 -
29 25
25 50
% in pace speed
97 26
21 51
Skewness index
1.000
27 16
52 28
8 53
29 3
54 30
55 31
56 32
57 33
58 34
59 35
60 36
61 37
62 38
63 39
64 T O T A L
147
ANALYSIS INFORMATION
Segment Length (mi.):
0.36 ADT:
3,269
Count Date:
6/7/22
Number of accidents:
0 Time period:
3 years
Calc. Crash Rate =
0.00 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2Ln
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 27mph, it appears reasonable to retain the existing posted speed limit of 25mph. No significant changes have occurred in the roadway or in traffic conditions within the limits of ET&S since the collection of data.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22352, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of _ 25mph
_ is hereby determined to be reasonable for
the above street segment.
0 5
10 15
20 25
30 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
West Lincoln Avenue between Lone Oak Ave & Solano Ave
Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
WB-EB
Recorder:
JCL
20 45
Date:
6/2/2025
Day:
Monday
21 46
Begin Time:
3:30 PM
End Time:
4:20PM
22 47
Weather:
Clear Warm Dry
Land Use:
Residential
23 1
48 24
49 Summary Statistics
25 2
50 Total Observed
131
26 2
51 Speed Range
23 -
36 27
10 52
50th percentile speed
30 28
19 53
85th percentile speed
33 29
18 54
10 mph pace speed
27 -
36 30
16 55
% in pace speed
96 31
14 56
Skewness index
1.143
32 18
57 33
13 58
34 9
59 35
6 60
36 3
61 37
62 38
63 39
64 40
65 41
66 42
67 43
68 44
69 T O T A L
131
ANALYSIS INFORMATION
Segment Length (mi.):
0.48 ADT:
5,247
Count Date:
5/15/2025
Number of accidents:
0 Time period:
5 years
Calc. Crash Rate =
0.00 Fatal + Injury Crashes per Million Vehicle-Miles
Street Width (ft):
Varies
Configuration:
2 Lane
Terrain:
Flat
Parking Conditions:
Discontinuous
Sidewalk:
Discontinuous
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 33mph, this section meets the definition of Residence District, it is the Engineers' judgement to lower the posted speed limit to 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 18
20 STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A
City of Napa
Engineering and Traffic Survey
VEHICLE SPEED DATA
Location:
West Pueblo Avenue between Linda Vista Ave & Solano Ave Posted Limit:
30 MPH
Speed
Number
Speed
Number
Direction:
WB-EB
Recorder:
JCL
20 45
Date:
5/30/2025
Day:
Friday
21 46
Begin Time:
9:30 AM
End Time:
10:45 AM
22 1
47 Weather:
Clear Cool Dry
Land Use:
Residential
23 1
48 24
4 49
Summary Statistics
25 7
50 Total Observed
112
26 9
51 Speed Range
22 -
36 27
9 52
50th percentile speed
29 28
15 53
85th percentile speed
32 29
13 54
10 mph pace speed
25 -
34 30
16 55
% in pace speed
90 31
11 56
Skewness index
1.111
32 11
57 33
6 58
34 4
59 35
4 60
36 1
61 37
62 38
63 39
64 40
65 41
66 42
67 43
68 44
69 T O T A L
112
ANALYSIS INFORMATION
Segment Length (mi.):
0.5 ADT:
2,896
Count Date:
6/7/2022
Number of accidents:
3 Time period:
5 years
Calc. Accident Rate =
1.14 accidents per million vehicle-miles
Street Width (ft):
40 Configuration:
2 Lanes
Terrain:
Flat
Parking Conditions:
Both
Sidewalk:
Discontinuous
Class:
Collector
Other Considerations:
RECOMMENDATION
Signature:
Date:
Based on the 85th percentile speed of 32mph, a crash rate 2x the State District Average, this section meets the definition of Residence District, it is the Engineer's judgement to lower the posted speed limit to 25mph.
On the basis of an engineering and traffic investigation, as reported above, and in accordance with the provisions of Sections 627, 22357, 22358 and 40802 of the California Vehicle Code, a speed limit of __ 25mph
__ is hereby determined to be reasonable for the
above street segment.
0 2
4 6
8 10
12 14
16 18
STATE OF CALIFORNIA
REGISTEREDPROFESSIONALENGINEER
DAVID J. PARISI
No. 2205
Exp._________09/30/23
T CFAR IF
09/30/27
David J. Parisi, PE, TE
5/8/2026
EXHIBIT A