CMF / CRF Details

CMF ID: 8233

Install separated bicycle lane

Description: Bike lanes separated from motorized traffic by different types of barriers and/or parking lane configurations

Prior Condition: No separate bicycle lane

Category: Bicyclists

Study: Separated Bike Lane Crash Analysis, Rothenberg et al., 2016

Star Quality Rating: 2 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 2.444
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value: -144.4   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Type: Vehicle/bicycle
Crash Severity: All
Roadway Types: Not specified
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type: Not specified
Traffic Volume:
Average Traffic Volume:
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:
State: CA, DC, FL, IL, MT, NY, OR, TX
Country: USA
Type of Methodology Used: Simple before/after
Sample Size (sites): 6 sites before, 6 sites after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Jan-17-2017
Comments: CMF Applies to average annual bicycle crashes when bicycle lane is separated by plastic bollards only. Study sites were located in Texas, Illinois, Oregon, California, Montana, New York, Florida, and Washington DC; however, it is unclear which States were used for the development of this CMF.