CMF / CRF Details

CMF ID: 1993

Modify signal phasing (implement a leading pedestrian interval)


Prior Condition:  Signalized intersection with pedestrian signal heads. Avg ped volume per day ranged from about 100 to 1000 peds.

Category: Intersection traffic control

Study: Safety Effectiveness of Leading Pedestrian Intervals Using the Empirical Bayes Method, Fayish and Gross, 2009

Star Quality Rating:4 Stars  [View score details]
Rating Points Total:110
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:0.064
Crash Reduction Factor (CRF)
Value:58.7  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:6.4
Crash Type:Vehicle/pedestrian
Crash Severity:All
Roadway Types:Principal Arterial Other
Street Type:
Minimum Number of Lanes:4
Maximum Number of Lanes:4
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:
Minimum Speed Limit:25
Maximum Speed Limit:25
Speed Unit:mph
Speed Limit Comment:
Area Type:Urban
Traffic Volume:
Average Traffic Volume:
Time of Day:All
If countermeasure is intersection-based
Intersection Type:Roadway/roadway (not interchange related)
Intersection Geometry:3-leg,4-leg
Traffic Control:Signalized
Major Road Traffic Volume:Minimum of 12000 to Maximum of 13500 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:1989 to 2007
Municipality:State College
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (crashes):24 crashes before, 14 crashes after
Sample Size (sites):10 sites before, 10 sites after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 01, 2009
Comments:Pedestrian crossing volumes reached nearly 1,000 pedestrians per hour per crosswalk during peak periods because of class schedules at the university, but pedestrian volumes were much smaller during off-peak times.