CMF / CRF Details

CMF ID: 10219

Reduce lane width from 12 ft to less than 12 ft

Description: Reduce average lane width from at least 12 ft wide to less than 12 ft wide

Prior Condition:  Average lane width is 12 ft

Category: Roadway

Study: Estimation of bicycle crash modification factors (CMFs) on urban facilities using zero inflated negative binomial models, Raihan et al., 2019

 
Star Quality Rating:2 Stars  [View score details]
Rating Points Total:65
Crash Modification Factor (CMF)
Value:1.72
Adjusted Standard Error:
Unadjusted Standard Error:0.58
Crash Reduction Factor (CRF)
Value:-72  (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:58
Applicability
Crash Type:Vehicle/bicycle
Crash Severity:All
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:Divided by Median
Minimum Speed Limit:30
Maximum Speed Limit:55
Speed Unit:mph
Speed Limit Comment:
Area Type:Urban
Traffic Volume:Minimum of 1300 to Maximum of 42000 Annual Average Daily Traffic (AADT)
Average Traffic Volume:12017 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:2011 to 2014
Municipality:
State:FL
Country:USA
Type of Methodology Used:Regression cross-section
Sample Size (crashes):178 crashes
Sample Size (miles):399 miles
Sample Size (mile-years):1596 mile-years
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 07, 2019
Comments:This CMF applies to vehicle/bicycle crashes on urban two-lane divided segments.