CMF / CRF Details

CMF ID: 2193

Implement mobile automated speed enforcement system

Description: Mobile unit vans with noticeable markings were parked close to the roadway. Police officers in vans operated laser guns and software. Signage and media campaigns informed drivers of enforcement.

Prior Condition:  No automated speed enforcement

Category: Advanced technology and ITS

Study: An Analysis of Automated Speed Enforcement Cameras in Charlotte, NC, Cunningham et al., 2008

Star Quality Rating:3 Stars  [View score details]
Rating Points Total:85
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:0.041
Crash Reduction Factor (CRF)
Value:9  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:4.1
Crash Type:All
Crash Severity:All
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:
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:2000 to 2005
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (site-years):84 site-years before, 84 site-years after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 01, 2009