CMF / CRF Details

CMF ID: 3257

Installation of bicycle lanes at signalized intersections with exclusive right turn lanes

Description: Installation of bicycle lanes at signalized intersections with exclusive right turn lanes

Prior Condition:  No bicycle lanes, cyclists shared the roadway with motor vehicles

Category: Bicyclists

Study: Safety Performance Functions for Bicycle Crashes in New Zealand and Australia, Turner et al., 2011

 
Star Quality Rating:2 Stars  [View score details]
Rating Points Total:40
Crash Modification Factor (CMF)
Value:0.97
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:3  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type:Vehicle/bicycle
Crash Severity:All
Roadway Types:All
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 and suburban
Traffic Volume:
Average Traffic Volume:
Time of Day:All
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:
Municipality:Christchurch
State:notusa
Country:New Zealand
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (crashes):15 crashes before, 14 crashes after
Sample Size (sites):55 sites before, 55 sites after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jul 15, 2011
Comments:note: study was performed in New Zealand and turning directions have been reversed for right-side driving countries when entered. Not much detail is presented regarding the before-after analysis. In addition, the CMF seems to have been calculated as the