CMF / CRF Details

Install separated bicycle lane

Countermeasure ID: 8234

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:	[View score details]
Rating Points Total:	20

Crash Modification Factor (CMF)
Value:	1.557
Adjusted Standard Error:
Unadjusted Standard Error:

Crash Reduction Factor (CRF)
Value:	-55.7 (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:

Applicability
Crash Type:	Vehicle/bicycle
Crash Severity:	All
Roadway Types:	Not specified
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:
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
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 :

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 plus. 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. 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.