CMF / CRF Details

CMF ID: 6135

Installation of fixed speed cameras

Description: Installation of fixed speed cameras on arterials limited access freeways

Prior Condition: No Speed Cameras Present

Category: Speed management

Study: An evaluation of the traffic safety effect of fixed speed cameras, De Pauw et al., 2014

Star Quality Rating: 3 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.92
Adjusted Standard Error:
Unadjusted Standard Error: 0.056
Crash Reduction Factor (CRF)
Value: 8   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 5.6
Crash Type: All
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not specified
Number of Lanes: 1 to 2
Road Division Type:
Speed Limit: 30 - 55 mph (50 - 90 km/hr)
Area Type: All
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 2008
Municipality: Flanders
Country: Belgium
Type of Methodology Used: Before/after using comparison group
Sample Size (sites): 65 sites before, 65 sites after
Sample Size (site-years): 252 site-years before, 166 site-years after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Mar-11-2015
Comments: This CMF addresses all injury crashes within 500 meters of speed camera location, regardless of direction.