CMF / CRF Details

CMF ID: 11430

Install high friction surface treatment (HFST)

Description:

Prior Condition: No Prior Condition(s)

Category: Roadway

Study: Crash Modification Factors for High-Friction Surface Treatment in Pennsylvania, Gayah et al., 2023


Star Quality Rating:	[View score details]
Rating Points Total:	130

Crash Modification Factor (CMF)
Value:	0.524
Adjusted Standard Error:
Unadjusted Standard Error:	0.079

Crash Reduction Factor (CRF)
Value:	47.6 (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:	7.9

Applicability
Crash Type:	Head on
Crash Severity:	All
Roadway Types:	Not specified
Street Type:
Minimum Number of Lanes:	2
Maximum Number of Lanes:	2
Number of Lanes Direction:	Both Directions
Number of Lanes Comment:	2 lanes, undivided
Crash Weather:	All
Road Division Type:	Undivided
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:	Urban
Traffic Volume:	Minimum of 151 to Maximum of 23709 Annual Average Daily Traffic (AADT)
Average Traffic Volume:	7273 Annual Average Daily Traffic (AADT)
Time of Day:	Not specified
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:	2007 to 2021
Municipality:
State:	PA
Country:
Type of Methodology Used:

Other Details
Included in Highway Safety Manual?	No
Date Added to Clearinghouse:	Dec 12, 2023
Comments:	CMF for crashes near the curve limits (horizontal curve plus 250ft of adjacent tangent sections) on 2-lane undivided roadways. CMF developed from small number of crashes, use with caution.

View the Full Study Details

This site is funded by the U.S. Department of Transportation Federal Highway Administration
and maintained by the University of North Carolina Highway Safety Research Center

For more information, contact Sarah Weissman Pascual at sarah.pascual@dot.gov

The information contained in the Crash Modification Factors (CMF) Clearinghouse is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The U.S. Government assumes no liability for the use of the information contained in the CMF Clearinghouse. The information contained in the CMF Clearinghouse does not constitute a standard, specification, or regulation, nor is it a substitute for sound engineering judgment.

CRASH MODIFICATION FACTORS CLEARINGHOUSE