CMF / CRF Details

CMF ID: 6882

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]
Rating Points Total:130
Crash Modification Factor (CMF)
Value:0.68
Adjusted Standard Error:
Unadjusted Standard Error:0.04
Crash Reduction Factor (CRF)
Value:32  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:4
Applicability
Crash Type:All
Crash Severity:K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types:Not specified
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: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:notusa
Country:Canada
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (crashes):344 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 severe (fatal and injury) crashes (activation of Intersection speed cameras at intersections with Red-light cameras in operation)