CMF / CRF Details

CMF ID: 7866

Install red-light cameras

Description: RLR enforcement cameras

Prior Condition: Signalized intersections without red-light cameras

Category: Advanced technology and ITS

Study: Validation and Application of Highway Safety Manual (Part D) in Florida, Abdel-Aty et al., 2014

 
Star Quality Rating: 2 Stars   [View score details]
Rating Points Total: 45
Crash Modification Factor (CMF)
Value: 1.08
Adjusted Standard Error:
Unadjusted Standard Error: 0.1
Crash Reduction Factor (CRF)
Value: -8   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 10
Applicability
Crash Type: Rear end
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not specified
Number of Lanes:
Road Division Type: All
Speed Limit:
Area Type: Urban
Traffic Volume:
Average Traffic Volume:
Time of Day: All
If countermeasure is intersection-based
Intersection Type:
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: 2006 to 2011
Municipality:
State: FL
Country: USA
Type of Methodology Used: 2
Sample Size (sites): 25 sites before, 25 sites after
Sample Size (site-years): 75 site-years before, 75 site-years after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Mar-08-2016
Comments: CMFs of rear-end crashes on all approaches of the adjacent intersections without red-light cameras The number of crashes in the after period were not reported in this study, however, they have been recorded as 300 to give 10 points as a beneift of doubt for one or more of the following: (1) number of miles/sites in the reference/treatment group, (2) number of crashes in the references/treatment group, (3) reporting AADTs for the aggregate dataset but not for the disaggragate dataset used for CMF development.