CMF / CRF Details

CMF ID: 6047

Implement mobile speed cameras

Description: Implement mobile speed cameras

Prior Condition: Roadways without speed cameras

Category: Advanced technology and ITS

Study: Reducing Road Traffic Injuries: Effectiveness of Speed Cameras in an Urban Setting, PĂ©rez et al., 2007

Star Quality Rating: 2 Stars   [View score details]
Rating Points Total: 40
Crash Modification Factor (CMF)
Value: 0.73
Adjusted Standard Error:
Unadjusted Standard Error: 0.056
Crash Reduction Factor (CRF)
Value: 27   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 5.6
Crash Type: All
Crash Severity: All
Roadway Types: Principal Arterial Other
Street Type:
Minimum Number of Lanes: 6
Maximum Number of Lanes: 6
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather: Not specified
Road Division Type: Divided by Median
Minimum Speed Limit: 80
Maximum Speed Limit: 80
Speed Unit: km/h
Speed Limit Comment:
Area Type: Urban
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: 2001 to 2005
Municipality: Barcelona
Country: Spain
Type of Methodology Used: Before/after using comparison group
Sample Size (crashes): 1276 crashes before, 972 crashes after
Sample Size (miles): 15 miles before, 15 miles after
Sample Size (miles): 34 mile-years before, 30 mile-years after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-08-2014
Comments: The method used in the analysis was a time-series study with a comparison group. The before time period was limited (2.25 years).