CMF / CRF Details

CMF ID: 10119

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:4 Stars  [View score details]
Rating Points Total:125
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:0.055
Crash Reduction Factor (CRF)
Value:8.8  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:5.5
Crash Type:Vehicle/pedestrian
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
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (crashes):434.9 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