CMF / CRF Details

CMF ID: 6879

Install red-light cameras

Description: RLR enforcement cameras

Prior Condition: Signalized intersections without Red-light camera

Category: Advanced technology and ITS

Study: Safety Evaluation of Red Light Camera and Intersection Speed Camera Programs in Alberta, Izadpanah et al., 2015

 
Star Quality Rating: 4 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 1.077
Adjusted Standard Error:
Unadjusted Standard Error: 0.017
Crash Reduction Factor (CRF)
Value: -7.7   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 1.7
Applicability
Crash Type: Rear end
Crash Severity: All
Roadway Types: Not specified
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type: Urban and suburban
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:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used: 1995 to 2008
Municipality: Alberta
State:
Country: Canada
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Sample Size (crashes): 5152 crashes after
Sample Size (sites): 80 sites before, 80 sites after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Nov-01-2015
Comments: CMF for rear-end crashes