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)
Value: 0.75
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:
Number of Lanes Direction:
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:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used: 1999 to 2002
Municipality: San Francisco
State: CA
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