CMF / CRF Details

CMF ID: 10366

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]
Crash Modification Factor (CMF)
Value: 1.03
Adjusted Standard Error:
Unadjusted Standard Error: 0.03
Crash Reduction Factor (CRF)
Value: -3   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 3
Crash Type: All
Crash Severity: All
Roadway Types: All
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 2016
State: MI
Type of Methodology Used: Before/after using comparison group
Sample Size (crashes): 4629 crashes before, 3995 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 only involving motorists less than 65 years and is not statistically significant.