CMF / CRF Details

Increased pavement friction

Countermeasure ID: 195

Description:

Prior Condition: No Prior Condition(s)

Category: Roadway

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

 
Star Quality Rating:5 Stars  [View score details]
Rating Points Total:135
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
Street Type:
Minimum Number of Lanes:
Maximum Number of Lanes:
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Wet road
Road Division Type:
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
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.

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