24City of Sunnyvale – Neighborhood Traffic Calming Program & Policy Study – June 2024 Comparison of Traffic Calming Program in
Comparable Cities
Attachment 2
25City of Sunnyvale – Neighborhood Traffic Calming Program & Policy Study – June 2024 • Reviewed recently
adopted/modified NTCP in 8
comparable cities within the Bay
Area
Review of Neighborhood Traffic Calming Programs
Qualifying
Criteria
Traffic Calming
Measures
Implementation
Process
Funding &
Prioritization
• Mountain View
• Cupertino
• Campbell
• Redwood City
• Fremont
• San Carlos
• Livermore
• Gilroy
Attachment 2
26City of Sunnyvale – Neighborhood Traffic Calming Program & Policy Study – June 2024 Qualifying Criteria – Roadway Classification
0 1
2 3
4 Local Residential Streets Local Residential and Residential Collector Streets
Local Residential, Residential Collector,
and Arterial Streets
Number of Reviewed Cities
Cupertino
Redwood City
Fremont Gilroy
Livermore
Campbell
San Carlos
Sunnyvale Mountain View
Attachment 2
27City of Sunnyvale – Neighborhood Traffic Calming Program & Policy Study – June 2024 Qualifying Criteria – 85th Percentile Speed
(Local Residential Streets)
0 1
2 3
4 5
30 mph 31 mph 32 mph 33 mph
Number of Reviewed Cities
85th Percentile Speed Thresholds (Posted Speed Limit)
(25 mph)
Sunnyvale - or
95th percentile speed >
35 mph
*Mountain View and
Cupertino use 30 mph as
threshold in school zones
** Campbell requires
both speed and volume
to exceed the thresholdMountain
View
Stage 2*
Sunnyvale
Stage 1
(25 mph) (25 mph) (25 mph)
Gilroy
Stage 1
Cupertino
Stage 2*
Livermore
Stage 1
Campbell
Stage 2**
Redwood City
Stage 2
Fremont
Stage 1
San Carlos
Stage 1
Attachment 2
28City of Sunnyvale – Neighborhood Traffic Calming Program & Policy Study – June 2024 Qualifying Criteria – 85th Percentile Speed
(Residential Collector Streets)
0 1
2 3
4 5
31 mph 32 mph 33 mph 37 mph 38 mph 42 mph 43 mph
Number of Reviewed Cities
85th Percentile Speed Thresholds (Posted Speed Limit)
(25 mph) (25 mph) (30 mph) (35 mph)(25 mph) (30 mph) (35 mph) • Mountain View – or
150 vehicles with
speed > 85th
percentile per day
• San Carlos - uses
same thresholds on
Arterial Streets
• Gilroy - or 70% traffic
exceeds posted speed
limit
Mountain
View
Stage 2
Mountain
View
Stage 2
Mountain
View
Stage 2
Campbell
Stage 2
Campbell
Stage 2
Campbell
Stage 2
San Carlos
Stage 1
San Carlos
Stage 1
San Carlos
Stage 1
Gilroy
Stage 1
Gilroy
Stage 1
Gilroy
Stage 1
Livermore
Stage 1
Livermore
Stage 1
Livermore
Stage 1
Attachment 2
29City of Sunnyvale – Neighborhood Traffic Calming Program & Policy Study – June 2024 0 1
2 3
4 ADT Only Cut-Through Traffic Only ADT and Cut-Through Traffic Number of Reviewed Cities
Volume Thresholds for Local Residential Streets
Qualifying Criteria – Volume (Local Residential Streets) San Carlos
(ADT > 1,200 vpd)
Stage 1
Mountain View
(CT > 25% ADT)
Stage 2
Cupertino
(CT > 25% ADT, and
ADT > 1,000 vpd)
Stage 2
Campbell
(ADT > 1,000 vpd)
Stage 2
Sunnyvale
(ADT > 1,000 vpd)
Stage 1
Fremont
(ADT > 800 vpd)
Stage 1
Redwood City
(CT > 40% ADT)
Stage 2
Livermore
(CT > 250 vpd)
Stage 1
Gilroy
(CT > 25% ADT, and
ADT > 1,000 vpd)
Stage 1
Attachment 2
30City of Sunnyvale – Neighborhood Traffic Calming Program & Policy Study – June 2024 0 1
2 3
4 ADT Only Cut-Through Traffic Only
Number of Reviewed Cities
Volume Thresholds for Residential Collector Streets
Qualifying Criteria – Volume (Residential Collector Streets) San Carlos
(ADT > 4,000 vpd)
Stage 1
Mountain View
(CT > 25% ADT)
Stage 2
Campbell
(ADT >2,000 vpd)
Stage 2
• San Carlos uses ADT >
13,000 vpd as
threshold for Arterial
Streets
• Gilroy only uses speed
threshold for
Residential Collector
Streets
Livermore
(CT > 250 vpd)
Stage 1
Attachment 2
31City of Sunnyvale – Neighborhood Traffic Calming Program & Policy Study – June 2024 Measure Sunnyvale Mountain
View Cupertino Campbell Redwood
City Fremont San Carlos Livermore Gilroy
Non-Physical Measures (Stage 1)
Radar Speed Trailer Deployment X X X X X X X X X
Traffic Enforcement Action X X X X X X X
Traffic Sgining and Pavement Marker X X X X X X X X X
Community Outreach/Education X X X X X
Physical Measures (Stage 2)
Vertical Deflection
Speed Hump X X X X X X
Speed Cushion/Lump X X X X X
Speed Table/Raised Crosswalk X X X X X X X
Raised Intersection X
Horizontal deflection
Traffic Circle X X X X X X X X X
Roundabout X X X X X X
Street Width Reduction
Curb Extension/Choker/Chicane X X X X X X X X X
Median Island X X X X X X X X X
Routing Restriction
Median Barrier, Forced Turn Island,
Barrier, Channelization X X X X
Diagonal Diverter X X X X
One-Way Street X X X
One-Way Choker, Half-Closure or
Semi-Diverter X X X
Street Closure and Cul-de-sac X X
Woonerf X X
Traffic Calming Measures Included in Reviewed City’s NTCPs Attachment 2
33City of Sunnyvale – Neighborhood Traffic Calming Program & Policy Study – June 2024 Petition Required:
Sunnyvale ≥ 50%
Redwood City 2 residents
Rest 1 resident
Comparison of Stage 1 Measures Implementation Process
Initiation Eligibility Implementation Follow-up Data
Collection
• Roadway
classification
• 5 cities require
data collection
for thresholds
evaluation
• 4 cities have no
requirements if
implementing
signage and
striping
• Implement if meets
criteria
• San Carlos staff may
use engineering
judgement to
proceed to Stage 2 if
they feel Stage 1 will
not work
• 5 cities conduct a
follow-up data
collection to
determine
effectiveness
• 4 cities do not require
follow-up data
= Sunnyvale’s process
Attachment 2
34City of Sunnyvale – Neighborhood Traffic Calming Program & Policy Study – June 2024 Petition Required:
Sunnyvale None*
Mountain View ≥ 10%
Cupertino ≥ 10%
Campbell ≥ 50%
Redwood City ≥ 50%
Fremont Staff
San Carlos > 50%
Livermore None*
Gilroy > 60%
*Not required if Stage 1 is
not successful
Comparison of Stage 2 Measures Implementation Process
Initiation Traffic Calming
Study
Neighborhood
Consensus Approval
• 1-2 neighborhood
meetings
• Postcard surveys
• City-led design
process
• Resident/City co-
lead design process
• 4 cities requires
data collection
• Sunnyvale requires ≥
60% and 100% within
100 feet of device
• >50% to >70% support
through neighborhood
vote
Livermore - 100%
support from fronting
home-owners
Gilroy - >50% within
100 feet of device
• City Council
approval only
• 2 cities -
Commission
approval then
City Council
approval
= Sunnyvale’s
process
Attachment 2
35City of Sunnyvale – Neighborhood Traffic Calming Program & Policy Study – June 2024 Comparison of Stage 2 Measures Implementation Process (cont’d) Funding Test Period
• General Fund
• Grants
• Private Funding
• Capital
Improvement
Program
• Permanent
Installation
• 4 cities – 9 to 12
months
• 4 cities – first
come first
served
• 5 cities –
prioritization
per data
collected/
location
• 4 cities – do not have a process
• 4 cities – petition to remove
device
• Livermore requires the
neighborhood to fully fund the
removal cost
= Sunnyvale’s process
Prioritization Removal Process
Attachment 2