CMF / CRF Details

CMF ID: 4646

Provide a left-turn lane on one major-road approach

Description:

Prior Condition:  Three-leg intersection without left-turn lane

Category: Intersection geometry

Study: Prediction of the Expected Safety Performance of Rural Two-Lane Highways, Harwood et al., 2000

 
Star Quality Rating:Cannot Be Rated (HSM)
Rating Points Total:
Crash Modification Factor (CMF)
Value:0.65
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:35  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type:All
Crash Severity:K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types:Minor Arterial
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:
If countermeasure is intersection-based
Intersection Type:Roadway/roadway (not interchange related)
Intersection Geometry:3-leg
Traffic Control:Stop-controlled
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:
Municipality:
State:No state(s) chosen.
Country:
Type of Methodology Used:Expert panel
Other Details
Included in Highway Safety Manual?
Date Added to Clearinghouse:Dec 01, 2009
Comments:HSM 1st Ed, Table 14-10