CMF / CRF Details

CMF ID: 2427

Implement automated red light running enforcement cameras (RLR-related crashes)

Description: RLR enforcement cameras

Prior Condition:  no RLR enforcement cameras

Category: Advanced technology and ITS

Study: Evaluating the Effectiveness of an Automated Red Light Running Enforcement Program in Iowa Using a Bayesian Analysis, Hallmark et al., 2010

Star Quality Rating:2 Stars  [View score details]
Rating Points Total:35
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:40  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Type:All
Crash Severity:All
Roadway Types:Principal Arterial Other
Street Type:
Minimum Number of Lanes:
Maximum Number of Lanes:
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:
Traffic Volume:
Average Traffic Volume:
Time of Day:All
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:
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:2001 to 2006
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (site-years):12 site-years before, 8 site-years after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jan 01, 1970
Comments:This CMF applies to RLR crashes. Crashes not indicated as rear-end where the reporting officer indicated “Ran Traffic Signal” as the major cause of the crash were called RLR crashes.