CMF / CRF Details

CMF ID: 10115

Install pedestrian countdown timer

Description: Install pedestrian countdown timer

Prior Condition: No Prior Condition(s)

Category: Intersection traffic control

Study: Safety Evaluation of Pedestrian Countdown Signals - Definitive Results from Two Cities in the United States, Srinivasan et al., 2019

Star Quality Rating: 5 Stars   [View score details]
Rating Points Total: 140
Crash Modification Factor (CMF)
Value: 0.921
Adjusted Standard Error:
Unadjusted Standard Error: 0.017
Crash Reduction Factor (CRF)
Value: 7.9   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 1.7
Crash Type: All
Crash Severity: All
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: Not specified
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry: 3-leg,4-leg
Traffic Control:
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:
Municipality: Charlotte & Philadelphia
State: NC, PA
Country: USA
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Sample Size (crashes): 4885.8 crashes after
Sample Size (sites): 333 sites before, 333 sites after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-17-2020