CMF / CRF Details

CMF ID: 2691

Removal of automated speed enforcement cameras (compared to before implementation)

Description:

Prior Condition: automated speed enforcement

Category: Advanced technology and ITS

Study: Estimating the Longer-Term Safety Effects of Speed Enforcement Cameras in Charlotte, NC, Moon and Hummer, 2010

 
Star Quality Rating: 3 Stars   [View score details]
Rating Points Total: 80
Crash Modification Factor (CMF)
Value: 0.81
Adjusted Standard Error:
Unadjusted Standard Error: 0.05
Crash Reduction Factor (CRF)
Value: 18.9   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 5.1
Applicability
Crash Type: All
Crash Severity: All
Roadway Types: Local
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: 1994 to 2008
Municipality: Charlotte
State: NC
Country:
Type of Methodology Used: Simple before/after
Sample Size (crashes): 42673 crashes before, 6117 crashes after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Aug-11-2010
Comments: