CMF / CRF Details

CMF ID: 5176

Convert 12-foot lanes to 10-foot lanes

Description: Convert 12-foot lanes to 10-foot lanes

Prior Condition:  No Prior Condition(s)

Category: Roadway

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:1.3
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:-30  (This value indicates an increase 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
Street Type:
Minimum Number of Lanes:2
Maximum Number of Lanes:2
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: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 13-4