CMF / CRF Details

CMF ID: 2965

Implement mobile speed cameras

Description: Implement mobile speed cameras

Prior Condition: No Prior Condition(s)

Category: Advanced technology and ITS

Study: Safety Effects of Mobile Speed Cameras in Norfolk: No More than Regression to the Mean?, Brenac, 2010

Star Quality Rating: 2 Stars   [View score details]
Rating Points Total: 60
Crash Modification Factor (CMF)
Value: 1.2
Adjusted Standard Error:
Unadjusted Standard Error: 0.29
Crash Reduction Factor (CRF)
Value: -20   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 28.5
Crash Type: All
Crash Severity: K (fatal),A (serious injury)
Roadway Types: Not Specified
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: Rural
Traffic Volume:
Average Traffic Volume:
Time of Day: All
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:
Traffic Control:
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used: 1999 to 2003
Municipality: Norfolk County
Country: United Kingdom
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Sample Size (crashes): 69 crashes before, 39 crashes after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Mar-21-2011