CMF / CRF Details

CMF ID: 5168

Convert 6-foot shoulder to 8-foot shoulder

Description: Convert 6-foot shoulder to 8-foot shoulder

Prior Condition: No Prior Condition(s)

Category: Shoulder treatments

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

 
Star Quality Rating: Cannot Be Rated (HSM)
Crash Modification Factor (CMF)
Value: 0.87
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value: 13   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type: Head on,Run off road,Sideswipe,Single vehicle
Crash Severity: All
Roadway Types: Minor Arterial
Number of Lanes: 2
Road Division Type:
Speed Limit:
Area Type: Rural
Traffic Volume: Minimum of 2000 Annual Average Daily Traffic (AADT)
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: Dec-01-2009
Comments: HSM 1st Ed, page 13-11