CMF / CRF Details

CMF ID: 10370

Install pedestrian countdown timer

Description: Install pedestrian countdown timer

Prior Condition: Intersections without countdown times (but with pedestrian signals)

Category: Intersection traffic control

Study: A Justification for Pedestrian Countdown Signals at Signalized Intersections: The Safety Impact on Senior Motorists, Boateng et al., 2019

Star Quality Rating: 3 Stars   [View score details]
Rating Points Total: 95
Crash Modification Factor (CMF)
Value: 0.71
Adjusted Standard Error:
Unadjusted Standard Error: 0.11
Crash Reduction Factor (CRF)
Value: 29   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 11
Crash Type: All
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: All
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 2016
State: MI
Type of Methodology Used: Before/after using comparison group
Sample Size (crashes): 136 crashes before, 122 crashes after
Sample Size (sites): 93 sites before, 93 sites after
Sample Size (site-years): 465 site-years before, 465 site-years after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Jun-01-2020
Comments: The study focused on safety impacts on motorists. The CMF is for crashes involving drivers aged 65 and above.