presented by nazir lalani p.e [email protected] traffic safety evaluations (pedestrians and...
TRANSCRIPT
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Presented by Nazir Lalani P.E
TRAFFIC SAFETY EVALUATIONS(Pedestrians and Bicyclists)
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Administered by ITS at UC Berkeley
Funded by OTS
Two Evaluators – Engineer and Law Enforcement Officer
Typically initiated by an agency
Public Works or Police/Sheriff’s Department
Process begins with completion of an “Intake” Form
ABOUT THE TSE PROGRAM
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Identifies the requesting agency
Provides contact information of the participating staff members
Lists the available information
Identifies the primary focus areas of the evaluation
May include attachments such as maps or aerial photographs
Form used by evaluators to establish contact with agency staff
Dates for two-day site visit established and confirmed by ITS
INTAKE FORM
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Top ten crash locations based on SWITRS data
Top five crash corridors based on SWITRS data
Pedestrian and bicycle circulation
School circulation issues
Cut through traffic on residential streets
Evaluation of previously identified solutions (roundabouts)
Evaluation of recently constructed improvements
Traffic signal timing and phasing
FOCUS AREAS - ENGINEERING
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ENGINEERING
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Identified by law enforcement evaluator
SWITRS data or Crossroads if used by agency
Based on total number of crashes – not crash rates
Types of collisions and citations issued
Data sorted prior to site visit
Used during site visit to analyze locations
Used after site visit to prepare the final report
HIGH CRASH LOCATIONS
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Takes place over a two day period
Begins with kick-off conference call (This is new)
Engineer evaluator tours city to analyze high crash locations
Engineer also evaluates other issues such as schools
Law enforcement officer meets with agency officers
Exit meeting held on second day to report preliminary findings
Final report prepared based on exit meeting discussions
SITE VISIT
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Crosswalk with two white lines
Broadside collisions due to restricted sight distanceand Yield sign controls on two approaches
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Schools have presented special challenges
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Roads with no turn lanes or bike lanes need to be put on a diet!
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Four travel lanes restriped to two lanes, left-turn lane and bike lane to reduce collisions
(aka “Road Diet”)
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Scramble pattern for pedestrians
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San Luis Obispo, CAScramble pattern for bicyclists
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Better placement of gates would also protect peds and bikes
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Warning displays at light rail station pedestrian crossing
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Increased use of blank out signs
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Truck apron is 7” high – too severe – generating complaintsfrom bus passengers
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IDENTIFY COUNTERMEASURES
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PEDESTRIAN COLLISION COUNTER MEASURES
Compliance with CAMUTCD
Upgrade markings
Improved signage
Positive traffic control/warning devices
Crosswalk relocations
Crosswalk removals
Traffic calming treatments
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Invisible marked crosswalk
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How many enhancements have been used here?
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http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_562.pdf (Send an email to [email protected] for a pdf)
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Provide on street striped bike lanes
Encourage bicyclists to ride with traffic
Colorized treatments to distinguish bike lanes
Provide better markings at intersections
Providing warning to drivers making turns
Remove parking
Establish Bike Boulevards
Provide better crossings for bike paths
BICYCLE CRASH COUNTEREASURES
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Bike box with color surface treatment
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Colored bike lanes in high conflict zones
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LAW ENFORCEMENT
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Collisions by Time of Day
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“Rat Box”
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High Tech
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Automated Enforcement
Mobile or fixed
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FINAL REPORT
Introduction
Background and Collision History
Traffic Engineering Evaluation
Law Enforcement Evaluation
Report Sections