CMF / CRF Details

CMF ID: 4366

Installing red light running (RLR) cameras for four-way signalized intersection

Description: Installing red light running cameras only on the approaches with high potential for crashes

Prior Condition: No red light running cameras on any of the signalized intersection approaches

Category: Advanced technology and ITS

Study: Red Light Running Camera Assessment, Sperley Ross, 2011

 
Star Quality Rating: 2 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 1.23
Adjusted Standard Error:
Unadjusted Standard Error: 0.24
Crash Reduction Factor (CRF)
Value: -23   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 24
Applicability
Crash Type: Angle,Rear end,Sideswipe
Crash Severity: B (minor injury),O (property damage only)
Roadway Types: Major Collector
Number of Lanes:
Road Division Type: Undivided
Speed Limit: 40
Area Type: Urban
Traffic Volume:
Average Traffic Volume:
Time of Day: Not specified
If countermeasure is intersection-based
Intersection Type: Roadway/roadway (not interchange related)
Intersection Geometry: 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: 2004 to 2009
Municipality: Salem
State: OR
Country: USA
Type of Methodology Used: Simple before/after
Sample Size (crashes): 77 crashes before, 40 crashes after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-06-2012
Comments: - The report compares the monthly average of crashes.- The before period is 50 months and the after period is 21 months.- This CMF considers crashes on the approaches that have RLR cameras installed.- This CMF covers ONLY a part of the area of influence of these approaches, in order to compare it to the adjacent intersections.