PROJECT TRAFFIC GENERATION
The San Diego Association of Governments' (SANDAG) (Not So) Brief Guide of Vehicular Traffic Generation Rates for the San Diego Region was used to calculate the project's trip generation. Based on the SANDAG trip rate for the Condominium land use (6-20 dwelling units per acre), the project is estimated to generate 104 ADT, with 8 trips during the AM peak (2 inbound/6 outbound) and 10 trips during the PM peak (7 inbound/3 outbound) during a typical weekday.
To account for existing trips on the project site, trip generation was calculated for the existing duplex structures. Based on the SANDAG trip rate for the Condominium land use, the existing site is estimated to generate 64 ADT, with 5 trips during the AM Peak (1 inbound/4 outbound) and 6 trips during the PM peak (4 inbound/2 outbound) during a typical weekday. The existing trips were discounted from the proposed trips to generate a net total trip volume of 40 ADT, with 3 trips during the AM peak (1 inbound/2 outbound) and 4 trips during the PM peak (3 inbound/I outbound) during a typical weekday.
Table 1 shows the net traffic generation calculations for the proposed project.
Attachment C contains the SAND AG (Not So) Brie/Guide of Vehicular Traffic Generation Rates for the San Diego Region (2002).
Table 1
718 STEVENS AVENUE TRIP GENERATION
AM Peak Hour PM Peak Hour
Land Use Unit Daily Total Inbound Outbound Total Inbound Outbound (per unit) (per (%AM) (%AM) (per (%PM) (%PM) unit) unit)
Trip Generation Rates (ITE)
Condominium (6-20 DU/acre) acre 8.00 8% 20% 80% 10% 70% 30% (SANDAG Trip Rate) Forecast Project Generated Trips
I Size Daily AM Peak Hour PM Peak Hour
Land Use Unit Trips Total Inbound Outbound Total Inbound Outbound Existing Trip Generation
Condominium
I 8 DU 64 5 I 4 6 4 2 (SANDAG Rate)
Proposed Project Trip Generation
Condominium
I 13 DU 104 8 2 6 10 7 3 (SANDAG Rate)
Net Change in Trips 40 3 1 2 4 3 1
SOURCE: SANDAG (Not So) Brie/Guide to Vehicular Traffic Generation Rates for the San Diego Region (2002).
Mr. Todd Parnell
December 20, 2022
LOCAL TRANSPORTATION ANALYSIS (LTA)
A Local Transportation Analysis (LT A) for a project in the San Diego Region is required when the following criteria outlined in the ITE's Guidelines for Transportation Impact Studies in the San Diego Region (May, 2019) is met:
Projects in conformance to the Land Use & Transportation Elements of the General/Community Plan:
• The project generates more than 1,000 ADT or 100 peak hour trips As previously shown in Table 1, the proposed multi-family residential development is estimated to generate a total of 104 trips per day. However, there are currently eight multi-family residences on the project site that will be removed with development of the proposed project. Including the trip credit associated with the existing multi-family residences, the proposed project would generate a net increase of 40 trips per day. As shown, vehicular trips generated by the proposed project are not estimated to exceed the recommended screening threshold of 1,000 ADT or 100 peak-hour trips per day projects consistent with the General Plan or Community Plan, and therefore the project does not require an LT A.
VEIDCLE MILES TRAVELED (VMT) SCREENING ASSESSMENT
As required by CEQA, a Vehicles Miles Traveled (VMT) screening assessment was conducted for the proposed project. This VMT screening assessment was conducted in accordance with ITE's Guidelines for Transportation Impact Studies in the San Diego Region (May, 2019).
The ITE document referenced above recommends the following VMT screening thresholds for land development projects:
• Screening Threshold for Small Projects
• Map-Based Screening for Residential and Office Projects • Presumption of Less Than Significant Impact for certain local-serving retail projects • Presumption of Less Than Significant Impact for Affordable Residential Development • Presumption of Less Than Significant Impact within transit priority access The SANDAG SB-743 VMT Web App on their Transportation Forecast Information Center (TFIC) webpage provides VMT screening maps for residential and office projects, which are based on data from the SANDAG Series 14 ABM-2+ regional travel demand model for Base Year 2016 and Future Year 2050. The SANDAG VMT screening maps for residential uses show that the VMT per capita resident in the census tract in which the project is located exceeds the screening threshold for a low VMT-generating area (15% or more below the regional average VMT per service population) for both Base Year 2016 and Future Year 2050. Attachment D contains the SANDAG VMT screening maps for residential projects for the census tract in which the project is located.
However, the project's trip generation would not exceed the VMT screening threshold for Small Projects.
The ITE guidelines suggests that land development projects consistent with the General Plan or Community Plan generating fewer than 1,000 vehicular trips per day may be assumed to have a less than significant transportation impact.
Mr. Todd Parnell
December 20, 2022
As previously shown in Table 1, the proposed multi-family residential development is estimated to generate a total of 104 trips per day. However, there are cun-ently eight multi-family residences on the project site that will be removed with development of the proposed project. Including the trip credit associated with the existing multi-family residences, the proposed project would generate a net increase of 40 trips per day. As shown, vehicular trips generated by the proposed project are not estimated to exceed the recommended screening threshold of 1,000 trips per day for Small Projects consistent with the General Plan or Community Plan, and the project is expected have a less than significant transportation impact per CEQA.
PROPOSED RECOMMENDATIONS IMPROVEMENTS/CONCLUSIONS
Table 1 shows that the proposed project is anticipated to generate a net increase of 40 ADT, with a net increase of 3 trips during the AM peak ( 1 inbound/2 outbound) and a net increase of 4 trips during the PM peak (3 inbound/1 outbound) during a typical weekday. It is anticipated that this generated traffic will have minimal impacts on intersections and roadways in the vicinity of the project.
The L TA screening assessment shows that the proposed project would not exceed ITE's recommended screening threshold of 1,000 trips per day for projects consistent with the General Plan or Community Plan. Therefore, the proposed project does not require an LT A.
The VMT screening assessment shows that the proposed project would not exceed ITE's recommended screening threshold of 1,000 trips per day for Small Projects consistent with the General Plan or Community Plan. Therefore, the proposed project is screened out from a full VMT analysis and is considered to have a less than significant transportation impact per CEQA.
Should you have any questions, please contact either David Mizell or me at (619) 291-0707.
Sincerely,
RICK ENGINEERING COMPANY
Brian R. Stephenson, PE, PTOE
Associate Principal
K:\Files\19762\Text\ 19672.00 l. 718StevensAve_ TrafficLetter _2022-1220.doc Attachments
718 STEVENS AVENUE TRAFFIC ASSESSMENT
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PROJECT SITE PLAN
ENGINEERING COMPANY
718 STEVENS AVENUE TRAFFIC ASSESSMENT
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ATTACHMENT C
(NOT SO)
BRIEF GUIDE OF VEHICULAR TRAFFIC GENERATION RATES
FOR THE SAN DIEGO REGION
APRIL 2002
401 B Street. Suite 800
San Diego, California 92101
(619) 699-1900 • Fax (619) 699-1950
NOTE: This listing only represents a guide of average, or estimated, traffic generation "driveway'· rates and some very general trip data for land uses (emphasis on acreage and building square footage} in the San Diego region. These rates (both local and national) are subject to change as future documentation becomes available, or as regional sources are updated. For more specific information regarding traffic data and trip rates, please refer to the San Diego Traffic Generators manual. Always check with local jun·sdictions for their preferred or appllcable rates.
LAND USE TRIP CATEGORIES
(PRIMARY:DIVERTED:PASS•BY]'
AGRICULTURE (Open Space) .......................... (80:18:2] AIRPORT ........................................................ [78:20:2] Commercial
General Aviation
Heliports
AUTOMOBILE'
Car Wash
Automatic
Sclf-serve
Gasoline ..................................... , ............. [21:51:28} with/Food Mart
with/Food Mart & Car Wash
Older Service Station Design
Sales (Dealer & Repair)
Auto Repair Center
Auto Parts Sales
Quick lube Tire Store
CEMETERY
CHURCH (or Synagogue) ............................... (64:25:11]
COMMERCIAL/RETAIL'
Super Regional Shopping Center
(More than 80 acres, more than
800.000 sq. ft., w/usually 3-tmajorstores)
Regional Shopping Center ........................ [54:35:11} (40-80ocres. 400.000-800.000
sq. ft., w/usually 2-t- major stores}
Community Shopping Center ..................... {47:31 :22) {15-40 acres, 125.000-400.000 sq. ft.,
w/usually 1 major store, detached
restaurant(s). grocery and drugstore)
Neighborhood Shopping Center
(Less than 15 acres, less than
125.000 sq. ft., w/usually grocery
& drugstore. cleaners. beauty & barber shop,
& fast food services)
Commercial Shops .................. ,, .................. {45:40:151 Specialty Retail/Strip Commercial
Electronics Superstore
Factory Outlet
Supermarket
Drugstore
Convenience Market (15-16 hours)
Convenience Market (24 hours)
Convenience Market (w/gasoline pumps}
Discount Club
Discount Store
Furniture Store
Lumber Store
Home Improvement Superstore
Hardware/Paint Store
Garden Nursery
Mixed Use: Commercial (w/supermarket)/Residentlal
EDUCATION
University (4 years) ....................................... {91:9:0] Junior College (2 years} ................................ [92:7:1] High School ............................................... [75:19:6] Middle/Junior High ................................... [63:25:12] Elementary ............................................... [57:25:10] Day Care ................................................. [28:58:14] FINANCIAL' .................................................. [35:42:23] Bank (Walk-In only)
with Drive-Through
Orive•Throughonly
Savings & Loan
Drive-Through only
HOSPITAL ..................................................... [73:25:2] General
Convalescent/Nursing
INDUSTRIAL
Industrial/Business Park (commercial lru::luded) ....... (79:19:2) Industrial Park (no commercla!)
Industrial Plant (multiple shifts) ....... [92:5:3]
Manufacturing/ Assembly
Warehousing
Storage
Science Research & Development
Landfill & Recycling Center
ESTIMATED WEEKDAY VEHICLE HIGHEST PEAK HOUR % (plus IN:OUT ratio) TRIP GENERATION RATE (DRIVEWAY] Between 6:00-9:30 A.M. Between 3:00•6:30 P.M. 2/acre·
60/acre, 100/flight. 70/1000sq. ft.• • • 5Yo (6:4) 6/o (5:5) 6/acre. 2/flight, 6/based aircraft• • • 9Yo (7:3) 15% (5:5) 100/acre··
900/site, 600/acre'" • 4lo (5:5) 9¾, (5:5)
100/washstaU• • ,r/4 (S:5) !!Yo (5:5)
160/vchicle fueling space· • 7¾, (5:5) !!Yo (S:5)
155/vehiclefueling space·• !!Yo (5:5) 9)f, (5:5)
150/vehiclefueling space. 900/station • • 7¾, (5:5) 9Yo (5:5) 50/1000 sq. ft., 300/acre. 60/servicc stall• • * 5Yo (7:3) 8¼ (4:6) 20/1000 sq. ft.. 400/acre, 20/service stall" 5Yo (7:3) 11% (4:6) 60/1000 sq. ft. • • 4lo ,re~ 40/servicestalJ• • 7% (6:4) 10¼ (5:5) 25/1000 sq. ft., 30/servlcestall""' 7¾, (6:4) 11% (5:5) 5/acre·
9/1000 sq. ft .. 30/acre• • (quadruple rates 5Yo (6:4) BX, (5:5) for Sunday, or days of assembly)
35/1000 sq, ft .. c 400/acrc" 4¾, (7:3) ,oo. (5:S)
50/1000 sq. ft .. c 500/acre" 4l6 (7:3) 93/o (5:5)
80/1000 sq. ft., 700/acre • • 4¾, (6:4) 1CIYo (S:5)
120/1000sq.ft., 1200/acre· ·• ,r,. (6:4) 101/o (5:5)
40/1000 sq. ft.. 400/acre" 3)(, (6:4) 9¾, (5:5)
50/1000 sq. ft .. 101/o (5:5)
40/1000sq.ft. • • 3)(, (7:3) 9)f, (5:5)
150/1 OOOsq, ft .. 2000/acre· • • 4lo (7:3) 101/o (5:5) 90/1000sq.ft. • • 4lo (6:4) 101/o (5:5)
500/lOOOsq. ft.•• 5Yo (5:S) BX, (5:5)
700/1000sq. ft.•• 9Yo (S:5) 7% (5:5)
850/1 OOOsq. ft., 550/vehic!efueling space·· 1% (5:5) 7% (5:5) 60/1000 sq. ft .. 600/acre • • • 1¼ (7:3) 9¾, (5.5)
60/1000sq. ft.. 600/acre· • 3)(, (6:4) !lYo (5:5)
6/1000sq.ft .. 100/acre·-- 4lo (7:3) 9¾, (5:5)
30/1000 sq. ft.. 150/acre- • 7¾, (6:4) 9¾, (5:5)
40/1000sq. ft.•• 5Yo (6:4) BX, (5:5)
60/1000sq. ft., 600/acre- • 2)1, (6:4) 93/o (5:5)
40/1000 sq. ft., 90/acre'" • 3)(, (6:4) 101/o (5:5)
{~jd~!~~ ~it~2Ji~::r{r:1~:~t~~~~~!)only)
3)(, (6:4) 9'/4 (5:5)
9¾, (3:7) 13% (6:4)
2. 4/student, 1 00 acre· 10% (8:2) 9'/4 (3:7)
1.2/student. 24/1000 sq. ft.. 120/acre • • • 12% (8:2) 93/o (6:4) 1 .3/student. 15/1000 sq. ft .. 60/acre- • • 20lo (7:3) 101/o (4:6)
1.4/student. 12/1000 sq. ft. SO/acre·• 301/o (6:4) 93/o (4:6) 1 .6/student. 14/1000 sq. ft.. 90/acre- • .. 32% (6:4) 9'/4 (4:6) 5/child. 80/1000 sq. ft.•• 17% (5:5) 18% (5:5)
150/1000sq. ft .. 1000/acre- • • 4lo (7:3) 8¼ (4:6)
200/1000 sq. ft .. 1500/acre• 5Yo (6:4) 101/o (S:5)
250(125 one-way)/lane· 3)(, (5:5] 13% (5:S)
60/1000sq. ft .. 600/acre- • 2)1, 9';6
100 (50 one-way)/lane • '" 4lo 15%
20/bed. 25/1000 sq. ft.. 250/acre- 8% (7:3) 10¼ (4:6)
3/bed .. i°/4 (6:4) 7% (4:6)
16/1000sq. ft., 200/acre- • • 12¾ (8:2) 12¾ (2:8)
8/1000 sq. ft .. 90/acre- • 11% (9:1) 12% (2:8)
10/1000 sq. ft,. 120/acre• 14% (8:2) 15% (3:7)
4/1000 sq. ft.. SO/acre•• 19% (9:1) 203/o (2:8)
5/1000 sq. ft .. SO/acre•• 13% (7:3) 15% (4:6)
2/1000 sq. ft.. 0.2/vault, 30/acre• 6¾, (5:5) 9'/4 (5:5) 8/1000 sq. ft .. 80/acre• 16% (9:1) 14% (1:9)
6/acre 11% (5:S) 101/o (4:6)
(OVER)
MEMBER AGENCIES. Cities of Carlsbad, Chula Vista, Coronado, Del Mar. El Cajon, Encinitas, Escondido, Imperial Beach, La Mesa, Lemon Grove, National City, Oceanside, Poway, San Diego, San Marcos, Santee, Solana Beach, Vista and County of San Diego.
AOVISORY/LIAlSON MEMBERS California Department of Transportation. County Water Authority.US. Department of Defense, S.D Unified Port District and Tijuana/Baja California.
TRIP LENGTH
(Mltes)1
10.8 12.5
2.8 5.1
5.2 3.6
4.3 8.9
9.0 4.8
5.0 3.4
3.7 3.4
8.3 9.0
11.7 LAND USE TRIP CATEGORIES
[PRIMARY:DIVERTED:PASS·BY)'
ESTIMATED WEEKDAY VEHICLE
TRIP GENERATION RATE (DRIVEWAY)
HIGHEST PEAK HOUR % [plus IN:OUT rotio)
Between 6:00-9:30 A.M. Betwe«1 3:00-6:30 P.M.
LIBRARY ......................................................... [44:44:12) LODGING ............................................................ [58:38:4) Hotel (w/coovent1on focihtiesirestaur.int)
Motel
Resort Hotel
Business Hotel
MILITARY .................................. ..
OFFICE
....... (82:16:2]
Standard Commercial Office ..... .,.......... . ..... [77:19:4] (less than 100,000 sq. ft.}
Large (High-Rise) Commercial Office ...................... (82:15:3] (more than 100,000 sq, ft .. 6- stories)
Office Park (400,000""' sq. ft.)
Single Tenant Office
Corporate Headquarters
Government (Civic Center)........ . ....... (50:34:16]
Post Office
Central/\Nafk-ln Only
Community (not including m:.111 drop lane)
Community (w/m.:1il drop lane)
Mail Drop Lane only
Department of Motor Vehicles
Medical-Dental ................................................. (60:30:1 OJ PARKS ................................................................. (66:28:6) City {developed w/meeting rooms and sports facilities}
Regional {developed}
Nelghborhood/County(undeveloped)
State (average 1000 ncres}
Amusement (Theme}
Snn Diego Zoo
Sea World
RECREATION
Beach, Ocean or Bay .......................................... [52:39:9] Beach, Lake (fresh water)
Bowling Center
Campground
Golf Course
Driving Range only
Marinas
Multi-purpose (miniature golf. video arcade. batting cuge, etc.) Racquetball/Health Club
Tennis Courts
Sports Facilities
Outdoor Stadium
Indoor Arena
Racetrack
Theaters (multiplex w/matince) ........................... [66:17:17) RESIDENTIAL ....................................................... (86:11:3) Estate. Urban or Rural
(average 1-2 OU/acre)
Single Family Detached
{average 3-6 OU/acre)
Condominium
{or any multi-family 6-20 DU/acre)
Apartment
{or any multi-family units more than 20 OU/acre)
Military Housing (off-bnse. multi-family)
{less than 6 OU/acre)
(6·20 DU/acre)
Mobile Home
Family
Adu!tsOnty
Retirement Community
Congregate Care Facility
RESTAURANT' ................................................... [51:37:12) Quality
Sit-down, high turnover
Fast Food (w/drive-through}
Fast Food {without drive-through)
Delicatessen {7 am-4pm)
TRANSPORTATION
Bus Depot
Truck Terminal
Waterport/Marine Terminal
Transit Station (light Rail w/parking}
Park & Ride Lots
• Primary source: San Diego Traffic Generators.
50/1000 sq. ft .. 400/acre-,.
10/occupied room. 300/acre
9/occupied room, 200/acre•
8/occupied room, 100/acre•
7 /occupled room• "
2.5/military & civilian personnel·
20/1 OOOsq. ft., 0 300/acre·
17/1000 sq. ft., 0 600/acre"
12/1000 sq.ft., 200/acre • ..
14/1000 sq. ft .. 180/acre·
7/1000 sq. ft .• 110/acre30/1000 sq. ft."•
90/lOOOsq. ft ...
200/1000 sq. ft .. 1300/acre•
300/1000 sq. ft .. 2000/acre·
1500 (7 50 one-way}/lane •
180/1000 sq. ft., 900/acre • •
50/1000 sq. ft.. 500/acreSO/acre•
20/acrC5/acre (add for specific sport uses). 6/picnic site •" 1 /acre. 10/picnic site,. •
BO/acre, 1 30/acre (summer only}• •
1151.lcre•
SO/acre600/1000 ft. shoreline, 60/acre50/1000 ft. shoreline. 5/acre• 30/1000 sq. ft .. 300/acre, 30/lane • •
4/campsite" •
7/acre. 40/hole. 700/course•
70/acrc. 14/tee box•
4/berth, 20/acre- • •
90/acre
30/1000 sq. ft., 300/acre, 40/court"
16/acre. 30/court• •
50!.:icre, 0.2/seat•
30/acre. 0.1 /seat"'
40/acrc, 0.6 scat·
80/1000 sq. ft., 1.8/seat, 360/screen·
12/dwelling unit • 11
10/dwelling unit • 11
8/dwe!ling unit •R
6/dwelling unit • 11
8/dwe!ling unit
6/dwelling unit
5/dincmng unit, 40/acre•
3/dwelllng unit, 20/acre•
. 4/dwel!ing unit• •
2.5/dwelling unit••
100/1000sq. ft .. 3/seat. 500/acre· • •
160/1000sq. ft., 6/scat, 1000/acre· ...
650/1000 sq. ft.. 20/seat. 3000/acre' • •
700/lOOOsq. ft.••
150/1000 sq. ft .. 11/sear
25/1000 sq. ft.· •
10/1000 sq. ft., 7/bay. 80/acre· •
1 70/berth, 12/acre" "
300/acre. 211-:/parking space (4/occupied) • •
400/acre (600/paved acre).
{ 5/parkingspace (8/occupled)" • •
2¾,
(%
f%
5½,
f%
9Yo
14%
13%
13"/4
15%
17%
9Yo
5½,
(%
7'/4
1¾,
6)(,
!%
4¼
133/c.,
1¾,
4%
73/o
JJ.
3¾
2¾,
4%
5%
'"%
f%
f%
a½,
f%
1¾,
1¾,
a½,
I¾
5½,
4'/4
1¼
f%
7)f,
5½,
9Yo
9Yo
14%
14%
(7:3) 10%
(6:4) ex,
(4:6) 9Yo
(6:4) 7).
(4:6) I¾
(9:1) 10%
(9:1) 13%
(9:1) 14%
(9:1) 13%
(9:1) 15%
(9:1) 16%
(9:1) 12%
1¾,
(6:4) 9Yo
(5:5) 10%
(5:5) 12%
(6:4) 10%
(8:2) 11%
a½,
(5:5) 6¾,
e,
(7:3) 11%
83/o
(8:2) 6¾,
(7:3) 970 (3:7) 1¾,
6¾,
(6:4) 6¾,
11%
ret
(3:7) 10%
(3:7) 10'/4
(2:8) 10%
(2:8) 9Yo
(3:7) 9Yo
(3:7) g){,
(3:7) 11%
(3:7) 10%
(4:6) 1¾,
(6:4) 6¾,
(6:4) Ill!,
(5:5) Ill!,
(5:5) 7)f,
(6:4) 1¾,
(6:4) 3¼
(4:6) !%
(7:3) 15%
(7:3) 15%
Other sources: /TE Trip Generation Report {6th Edition], Trip Generation Rates (other agenclesand pub!icauons). v,mousSANOAG & CAL TRANS studies. reportsandestunates.
Trip category percentage ratios are daHy from local household surveys. often cannot be applied to very specific land uses. ;md do not inclUde: non-resident dnvers (draft SANOAG AntJ!ysisofTripDivcrslon. revised November. 1990):
PRIMARY• one tnp directly between origin and pnmary <k:st1nation.
DIVERTED• linked trip (having one or more stops along the way to a pnmary destination) whose distance compared to direct distance?: 1 mile.
PASS·BY-undivertedord1verted < 1 mile.
Trip lengths are average weighted for all trips to and from general !and use s1te. {All trips system-wide average length • 6.9 miles) c fitted curve equation: Lnfl) .. 0.502 ln{x) + 6.945} T t t I tr 1 000 r 0 Fittedcuveequatlon: Lnfn ""' 0.756 I.Jl(x) + 3,950 "" 0 3 ips, x .. • sq. t. • F1ttedcLWVeequat1on: t"' ~2.169Ln{dl + 12.85 t ,,. trips/OU, d "' density (DU/acre), OU .. dwelling unit ~ Suggested PASS-BY {undiverted or diverted < 1 mHeJ percentages for trip rate reductions only dunng P .M. peak period {based on combination of local data/teview and Other sources• •):
COMMERCIAL/RETAIL
Regional Shopping Center 3J¾,
Comm.mity ~ " lJ¼
Nelghb<Xhood ~ 40½
Specialty Reta!l!Stnp Commercial {other} 10¾,
Supermarket «J¼
Convemence Market S)%
Discount Club/Store n¾.
FlNANCtAL
Bani< ZS¾
AUTOMOOILE Gasoline Station SJ¾
RESTAURANT Quahty 10"/4
Sit-down high turnover 3'.J¾,
Fast Food 4J¼
' Trip Reductions• In order to help promote reg tonal "smart growth" po!ieics, and acknowledge San O:ego'se>:panding mass transit system, constder vehicle tnp rate rcducuons (with proper documentation and necessny ad1ustments fo, peak periods). The following are some e>:amples:
{l J A 5% dally trip reductiOn for land uses with transit access or near transit stationsaccesslblewithm 1(4 mile.
{21 Up to 10%dai1y trip reduction for mlxed•use developments where rt!Sidentia! and commercial retail are combined (demonstrate mode split of walking trips to replace vehicular trips).
[5:5)
(6:4)
(6:4)
(4:6)
(6:4)
(2:8)
[2:8)
(2:8)
(2:8)
(2:8)
(1:9)
(3:7)
(5:5)
(5:5)
(5:5)
(4:6)
(3:7)
(5:5)
(6:4)
(4:6)
(3:7)
(5:5)
(6:4)
(6:4)
(5:5)
(6:4)
(7:3)
(7:3)
(7:3)
(7:3)
(6:4)
(6:4)
(6:4)
(6:4)
(6:4)
(5:5)
(7:3)
(6:4)
(5:5)
(5:5)
(3:7)
(5:5)
(3:7)
(3:7)
TRIP LENGTH
(Mitcs)i
3.9 7.6
11.2 8.8
10.0 8.8
6.0 6.4
5.4 6.3
6.1 7.9
4.7 ATTACHMENT D - 2016 Screening Map
ATTACHMENT D 2050 Screening Map
COUNCIL ACTION:
______________________________________________________________________ ______________________________________________________________________ AGENDA ITEM # C.1.
STAFF REPORT
CITY OF SOLANA BEACH
TO: Honorable Mayor and City Councilmembers
FROM: Daniel King, Interim City Manager
MEETING DATE: April 24, 2024
ORIGINATING DEPT: Engineering Department
SUBJECT: Presentation of Public Right-of-Way Parkway Surface Alternatives
BACKGROUND:
Public street improvements in some of the older residential neighborhoods in the City are limited to two 12-foot wide paved vehicular travel lanes within a 40-foot wide right-of-way.
In most instances, the pavement is on top of native soil or an aggregate base with no edge treatments or sidewalks. While there is a minimum 40-foot wide right-of-way in most neighborhoods, a majority of the right-of-way is encroached upon by adjacent property owners with private improvements such as planting, sprinklers, pavers, walkways, stairs, and other decorative front yard improvements.
This item is before the City Council to provide information about the City’s current practice and receive directions about how the space between the edge of pavement and the property line, also known as a parkway, should be improved when adjacent private development is proposed.
DISCUSSION:
To make the public right-of-way more user friendly for all users, as part of the private development process, as well as implementation of the City’s Capital Improvement Projects, Staff continues to make every effort to create the space adjacent to the vehicle travel lanes for walking and parking purposes. Since maintaining community character is one of the pillars of the City’s Work Plan, Staff has traditionally required private development applicants to improve their street frontage by constructing a low profile mountable concrete curb along the edge of the pavement and 10 feet of bonded and compacted Decomposed Granite (DG) surface in the public right-of-way for walking and parking.
April 24, 2024
Public Right-of-Way Parkway Surface Alternatives
Bonded and compacted DG is an aesthetically pleasing surface, particularly when it is first constructed. DG is durable on flat or gradually sloped areas. However, in steeper sloped areas, DG surfaces erode and require frequent maintenance. The erosion of DG into streets and storm drains is undesirable because of reduced traction and storm drain issues. Walkway erosion can pose trip hazards for pedestrians and DG can become very soft when mixed with rain or surface water.
As part of the land entitlement and permit process for residential neighborhoods, Staff requires that, except for the driveway access from the street to the garage, the rest of the parkway area to be surfaced with bonded and compacted DG. Some development projects discharge the site drainage at the property line and allow the run-off to flow towards the street through the DG area. This can create a soft surface when DG is exposed to water and, therefore, Staff requires a concrete or other type of hard apron approximately 3-5 feet wide for drainage purposes. Some property owners also request that a paved surface be allowed for walking from the street to their front doors. We have also received requests from residents to place decorative pavers or other hard surface improvements in the parkway area along their property frontage on a voluntary basis.
In response to the community’s requests, City Council directed Staff to perform a more comprehensive evaluation of the functionality of the DG surfaces and to provide alternative options for other surface improvements such as pavers and decorative pavements for the City Council’s consideration.
Staff visited several locations where DG has been constructed during the past 10 years.
All locations visited by Staff show signs of deterioration. Areas in steeper locations or higher traffic volumes show significantly more deterioration. In some locations, the DG has been removed and reconstructed because the deteriorated surface was unrepairable.
Some DG areas were constructed with wood diverters to direct the runoff toward the street and reduce erosion. However, even with the wood diverters, the DG deteriorated and needed frequent maintenance to maintain an acceptable walking surface for pedestrians.
In general, paving the public right-of-way with D.G. is not the most suitable surface in all instances, particularly when excessive moisture is introduced. A few examples of DG failures are presented in Attachment 1.
Staff also investigated various alternatives for surface improvements in the parkway area.
In addition to asphalt and concrete, there are countless alternatives for pavers and other types of surfaces. Many of these alternatives have been placed in the parkway areas in Solana Beach. Some of these locations are presented in Attachment 2.
Staff will present these alternative surface options for the City Council’s consideration.
CEQA COMPLIANCE STATEMENT:
The project is exempt from the California Environmental Quality Act (CEQA) pursuant to Section 15301 (c).
April 24, 2024
Public Right-of-Way Parkway Surface Alternatives
FISCAL IMPACT: N/A
WORK PLAN: N/A
DEPARTMENT RECOMMENDATION:
Receive report, discuss and provide direction, as necessary.
CITY MANAGER’S RECOMMENDATION:
Approve Department Recommendation.
___________________________
Daniel King, Interim City Manager
Attachments:
1. DG Erosion Pictures
2. Paver Alternative Pictures
986 Avocado Pl
East Cliff at N Rios
548 Ford 304 Corto
302 S Nardo PAGE 1 OF 5 514 Seabright ATTACHMENT 2
336 Corto 704 Seabright
727 N Rios 826 Seabright PAGE 2 OF 5
346 Glenmont 402 S Rios
632 Marvista 640 N Granados
PAGE 3 OF 5
PAGE 4 OF 5
PAGE 5 OF 5