CMF / CRF Details

CMF ID: 10116

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: Cannot Be Rated (Insufficient Information)
Crash Modification Factor (CMF)
Value: 0.988
Adjusted Standard Error:
Unadjusted Standard Error: 0.026
Crash Reduction Factor (CRF)
Value: 1.2   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 2.6
Applicability
Crash Type: All
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not specified
Number of Lanes:
Road Division Type:
Speed Limit:
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): 2283.8 crashes after
Sample Size (sites): 333 sites before, 333 sites after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Jul-26-2019
Comments: