CMF / CRF Details

CMF ID: 9911

Modify signal phasing (implement a leading pedestrian interval)

Description:

Prior Condition: Signal phasing without leading pedestrian interval

Category: Intersection traffic control

Study: Safety Evaluation of Protected Left-Turn Phasing and Leading Pedestrian Intervals on Pedestrian Safety, Goughnour et al., 2018

 
Star Quality Rating: 4 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.86
Adjusted Standard Error:
Unadjusted Standard Error: 0.037
Crash Reduction Factor (CRF)
Value: 14   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 3.7
Applicability
Crash Type: All
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: All
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type: Urban and suburban
Traffic Volume:
Average Traffic Volume:
Time of Day: All
If countermeasure is intersection-based
Intersection Type: Roadway/roadway (not interchange related)
Intersection Geometry: Not specified
Traffic Control: Signalized
Major Road Traffic Volume: Minimum of 1828 to Maximum of 46599 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume: Minimum of 4944 to Maximum of 48075 Annual Average Daily Traffic (AADT)
Average Major Road Volume : 23569 Annual Average Daily Traffic (AADT)
Average Minor Road Volume : 15527 Annual Average Daily Traffic (AADT)
Development Details
Date Range of Data Used: 2001 to 2014
Municipality: New York City
State: NY
Country:
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Sample Size (crashes): 1054 crashes before, 893 crashes after
Sample Size (sites): 42 sites before, 42 sites after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Mar-11-2019
Comments: Crash Type = Total Injury Crashes. This CMF is for sites where LPIs were implemented either at all crossings (across major and minor roads) or only for crossings across the minor road (parallel to the major road).