CMF / CRF Details

CMF ID: 8186

Installation of fixed speed cameras

Description: Installation of fixed speed cameras on arterials limited access freeways

Prior Condition:  No speed camera present

Category: Speed management

Study: Safety effects of fixed speed cameras - An empirical Bayes evaluation, Hoye, 2015

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:80
Crash Modification Factor (CMF)
Value:0.76
Adjusted Standard Error:
Unadjusted Standard Error:0.245
Crash Reduction Factor (CRF)
Value:24  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:24.5
Applicability
Crash Type:All
Crash Severity:K (fatal),A (serious injury)
Roadway Types:Not specified
Street Type:
Minimum Number of Lanes:2
Maximum Number of Lanes:2
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:
Minimum Speed Limit:50
Maximum Speed Limit:90
Speed Unit:km/h
Speed Limit Comment:
Area Type:Rural
Traffic Volume:
Average Traffic Volume:8419 Annual Average Daily Traffic (AADT)
Time of Day:All
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:
Traffic Control:
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:1997 to 2013
Municipality:
State:notusa
Country:Norway
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (crashes):101 crashes before, 42 crashes after
Sample Size (sites):130 sites before, 130 sites after
Sample Size (site-years):390 site-years before, 390 site-years after
Sample Size (miles):124.4 miles before, 124.4 miles after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Nov 10, 2016
Comments:Medium section: 100m upstream and 1km downstream of camera location