CMF / CRF Details

CMF ID: 4673

Install automated speed camera at signalized intersection

Description: Install an automated speed camera (photo radar) at a signalized intersection

Prior Condition: Signalized intersection with no automated speed enforcement camera.

Category: Advanced technology and ITS

Study: Evaluation of the Photo Enforcement Safety Program of the City of Winnipeg, Vanlaar, Robertson, and Marcoux, 2011

 
Star Quality Rating: 4 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.76
Adjusted Standard Error:
Unadjusted Standard Error: 0.1059
Crash Reduction Factor (CRF)
Value: 24   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 10.59
Applicability
Crash Type: Speed related
Crash Severity: A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not specified
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type: Not specified
Traffic Volume:
Average Traffic Volume:
Time of Day: All
If countermeasure is intersection-based
Intersection Type: Roadway/roadway (not interchange related)
Intersection Geometry: No values chosen.
Traffic Control: Signalized
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used: 1997 to 2008
Municipality: Winnipeg
State:
Country: Canada
Type of Methodology Used: Simple before/after
Sample Size (site-years): 315 site-years before, 233 site-years after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: May-01-2013
Comments: Study used the time series analysis method.