CMF / CRF Details

CMF ID: 8221

Install pedestrian countdown timer

Description: Install pedestrian countdown timer

Prior Condition:  Intersections without pedestrian countdown signals

Category: Intersection traffic control

Study: Evaluating Effectiveness of Pedestrian Countdown Signals on Safety of Older Drivers, Kwigizile et al., 2016

Star Quality Rating:3 Stars  [View score details]
Rating Points Total:75
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:0.117
Crash Reduction Factor (CRF)
Value:52  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:11.7
Crash Type:Other
Crash Severity:K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types:Not specified
Street Type:
Minimum Number of Lanes:1
Maximum Number of Lanes:10
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:All
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Not specified
Traffic Volume:
Average Traffic Volume:
Time of Day:All
If countermeasure is intersection-based
Intersection Type:Not specified
Intersection Geometry:Not specified
Traffic Control:Signalized
Major Road Traffic Volume:Minimum of 1637 to Maximum of 70100 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume:Minimum of 730 to Maximum of 35214 Annual Average Daily Traffic (AADT)
Average Major Road Volume :14072 Annual Average Daily Traffic (AADT)
Average Minor Road Volume :7348 Annual Average Daily Traffic (AADT)
Development Details
Date Range of Data Used:2004 to 2013
Type of Methodology Used:Before/after using comparison group
Sample Size (crashes):62 crashes before, 45 crashes after
Sample Size (sites):93 sites before, 93 sites after
Sample Size (site-years):279 site-years before, 279 site-years after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jan 17, 2017
Comments:CMFs of crashes involve drivers at age of 65 or older.