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]
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
Number of Lanes:
Road Division Type:
Speed Limit:
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.