CMF / CRF Details

CMF ID: 6883

Install automated speed camera at signalized intersection

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

Prior Condition: Signalized intersections with Red-light camera but without Intersection speed camera activated

Category: Advanced technology and ITS

Study: Safety Evaluation of Red Light Camera and Intersection Speed Camera Programs in Alberta, Izadpanah et al., 2015

 
Star Quality Rating: 4 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.69
Adjusted Standard Error:
Unadjusted Standard Error: 0.068
Crash Reduction Factor (CRF)
Value: 31   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 6.8
Applicability
Crash Type: Angle
Crash Severity: All
Roadway Types: Not specified
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type: Urban and suburban
Traffic Volume:
Average Traffic Volume:
Time of Day:
If countermeasure is intersection-based
Intersection Type: Roadway/roadway (not interchange related)
Intersection Geometry: 3-leg,4-leg
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: 1999 to 2012
Municipality: Alberta
State:
Country: Canada
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Sample Size (crashes): 147 crashes after
Sample Size (sites): 46 sites before, 46 sites after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Nov-01-2015
Comments: CMF for angle crashes (activation of Intersection speed cameras at intersections with Red-light cameras in operation)