CMF / CRF Details

CMF ID: 195

Increased pavement friction

Description:

Prior Condition: No Prior Condition(s)

Category: Roadway

Study: Crash Reduction Factors for Traffic Engineering and ITS Improvements, Harkey et al., 2008

 
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Crash Modification Factor (CMF)
Value: 0.43
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value: 57   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type: Wet road
Crash Severity: All
Roadway Types: All
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type: All
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:
Country:
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-01-2009
Comments: This CMF is for high friction treatment applied principally on the major road approaches at intersections, but oftenextended some distance away from the intersection as well.