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]
Crash Modification Factor (CMF)
Value: 0.48
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
Applicability
Crash Type: Other
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not specified
Number of Lanes: 1-10
Road Division Type: All
Speed Limit:
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
Municipality:
State: MI
Country:
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.