HomeMy WebLinkAbout002-004 Speed SurveySpeed Survey
April 15, 2020
City of Saratoga
City of Saratoga 2020 Speed Survey
Agenda
1.Why we need speed surveys
2.Process for setting speed limits
3.Evaluating speeds
4.Summary of findings and changes
5.Questions
City of Saratoga 2020 Speed Survey
Why do we need a Speed Survey?
To be able to radar enforce speed limits on streets,
other than those designated as local streets.
Law and process governed by:
•California Vehicle Code
•California Manual of Uniform Traffic Control
Devices (MUTCD)
City of Saratoga 2020 Speed Survey
How Are Speed Limits Set?
Speed
Data
Collision
Data
Residential
Density
Other
Factors
City of Saratoga 2020 Speed Survey
What is the 85th Percentile Speed?
Speed at or below which 85% of vehicles are traveling
City of Saratoga 2020 Speed Survey
Evaluating 85th Percentile Speed.
Collect Speed Data
(85%-ile speeds)
Round Up to
Nearest 5 mph
Can reduce by 5
mph without
further justification
Round Down to
Nearest 5 mph
Can reduce by 5
mph based on
certain factors
City of Saratoga 2020 Speed SurveyStudy Segments
City of Saratoga 2020 Speed SurveyCurrent Speed Limits
City of Saratoga 2020 Speed SurveyObserved Speeds
City of Saratoga 2020 Speed SurveyObserved Speeds
City of Saratoga 2020 Speed Survey
General Findings
Speeds have increased on 29 of 44
roadway segments (65%) since 2013.
Speeds have decreased on 15 of 44
roadway segments (35%) since 2013.
All but one of the roadway segments are
recommended to maintain the current speed limit.
City of Saratoga 2020 Speed Survey
Recommended Changes
Saratoga Avenue from Fruitvale
Avenue to Dagmar Drive:
•Existing Speed Limit: 40 mph
•85th Percentile Speed: 41 mph
•Recommended Speed Limit:
35 mph
City of Saratoga 2020 Speed Survey
Summary
•Maintain speed limit on 43
segments
•Reduce speed limit on
Saratoga Avenue just west of
SR 85
•Eight segments not
enforceable by radar
City of Saratoga 2020 Speed Survey
Questions?
City of Saratoga 2020 Speed Survey
Summary
•Maintain speed limit on 43 segments
•Reduce speed limit on Saratoga Avenue
just west of SR 85
•Eight segments not enforceable by radar:
•Chester Avenue between Allendale
Avenue to Ten Acres Road
•Glen Brae Drive between Scotland
Drive and Cox Avenue
•Herriman Avenue between Saratoga-
Sunnyvale Road and Saratoga Avenue
•Miller Avenue between Prospect Road
and Cox Avenue
•Pierce Road between Highway 9 and
Mount Eden Road
•Quito Road between Southerly City
Limit and Bicknell Road
•Quito Road between Bicknell Road
and Pollard Road
•Scotland Drive between Saratoga
Avenue to Cumberland Drive