CMF / CRF Details

CMF ID: 8216

Install bicycle lanes


Prior Condition: No dedicated on-road painted cycle lane

Category: Bicyclists

Study: The Effect of Cycle Lanes on Cycling Numbers and Safety, Koorey and Parsons, 2016

Star Quality Rating: 2 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.77
Adjusted Standard Error:
Unadjusted Standard Error: 0.24
Crash Reduction Factor (CRF)
Value: 23   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 24
Crash Type: Vehicle/bicycle
Crash Severity: All
Roadway Types: All
Number of Lanes:
Road Division Type: All
Speed Limit:
Area Type: Not specified
Traffic Volume: Minimum of 5000 to Maximum of 39000 Annual Average Daily Traffic (AADT)
Average Traffic Volume: 15000 Annual Average Daily Traffic (AADT)
Time of Day: Not specified
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: 1999 to 2009
Municipality: Christchurch
Country: New Zealand
Type of Methodology Used: Before/after using comparison group
Sample Size (crashes): 72 crashes before, 41 crashes after
Sample Size (sites): 12 sites before, 12 sites after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Jan-17-2017


The information contained in the Crash Modification Factors (CMF) Clearinghouse is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The U.S. Government assumes no liability for the use of the information contained in the CMF Clearinghouse. The information contained in the CMF Clearinghouse does not constitute a standard, specification, or regulation, nor is it a substitute for sound engineering judgment.