CMF / CRF Details

CMF ID: 5216

Modify length of acceleration lane

Description: Modify length of acceleration lane

Prior Condition: No Prior Condition(s)

Category: Interchange design

Study: Highway Safety Manual, 1st Edition, Various, 2010

 
Star Quality Rating: Cannot Be Rated (HSM)
Crash Modification Factor (CMF)
Value: Equation
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:
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: Principal Arterial Interstate
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type:
Traffic Volume:
Average Traffic Volume:
Time of Day:
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:
Municipality:
State: No state(s) chosen.
Country:
Type of Methodology Used: Not specified
Other Details
Included in Highway Safety Manual? Yes
Date Added to Clearinghouse:
Comments: HSM 1st Ed, page 15-6. Length of acceleration lane is measured from the nose of the gore area to the end of the lane drop taper.