CMF / CRF Details

CMF ID: 10233

Provide protected left-turn phase

Description:

Prior Condition:  No approaches have a protected phase.

Category: Intersection traffic control

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

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:80
Crash Modification Factor (CMF)
Value:0.69
Adjusted Standard Error:
Unadjusted Standard Error:0.14
Crash Reduction Factor (CRF)
Value:31  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:14
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:Urban
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:Minimum of 1500 to Maximum of 74500 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume:
Average Major Road Volume :31829 Annual Average Daily Traffic (AADT)
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):380 crashes
Sample Size (sites):397 sites
Sample Size (site-years):1588 site-years
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 07, 2019
Comments:This CMF applies to vehicle-bicycle crashes at four-leg signalized intersections when at least one approach is converted to protected control.