CMF / CRF Details

CMF ID: 1409

Replace existing WALK / DON'T WALK signals with pedestrian countdown signal heads


Prior Condition:  Conventional pedestrian signals, not countdown LED signals.

Category: Intersection traffic control

Study: Pedestrian Countdown Signals: Experience with an Extensive Pilot Installation, Markowitz et al., 2006

Star Quality Rating:1 Star  [View score details]
Rating Points Total:0
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:25  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Type:Vehicle/pedestrian
Crash Severity:A (serious injury),B (minor injury),C (possible injury)
Roadway Types:Not specified
Street Type:
Minimum Number of Lanes:
Maximum Number of Lanes:
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Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Urban
Traffic Volume:
Average Traffic Volume:
Time of Day:
If countermeasure is intersection-based
Intersection Type:Roadway/roadway (not interchange related)
Intersection Geometry:Not specified
Traffic Control:Signalized
Major Road Traffic Volume:
Minor Road Traffic Volume:
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Average Minor Road Volume :
Development Details
Date Range of Data Used:1999 to 2002
Municipality:San Francisco
Type of Methodology Used:Simple before/after
Sample Size (crashes):27 crashes before, 13 crashes after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 01, 2009