CMF / CRF Details

CMF ID: 9181

Install red-light cameras at intersections

Description:

Prior Condition:  Intersections without red-light running cameras

Category: Advanced technology and ITS

Study: Effects of Red Light Running Camera Systems Installation and Then Deactivation on Intersection Safety, Ko et al., 2017

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:85
Crash Modification Factor (CMF)
Value:1.18
Adjusted Standard Error:
Unadjusted Standard Error:0.16
Crash Reduction Factor (CRF)
Value:-18  (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:16
Applicability
Crash Type:Other
Crash Severity:All
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:All
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Urban
Traffic Volume:
Average Traffic Volume:
Time of Day:Not specified
If countermeasure is intersection-based
Intersection Type:Not specified
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:2004 to 2011
Municipality:Houston
State:TX
Country:USA
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (crashes):13 crashes before, 85 crashes after
Sample Size (sites):48 sites before, 48 sites after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jun 17, 2018
Comments:CMF for rear-end red-light running crashes.