CMF / CRF Details
CMF ID: 7901
Improve pavement friction (HFS-High Friction Surfacing)
Description: The safety benefit of High Friction Surfacing Treatment (HFS)
Prior Condition: Individual curve with perceived friction-related crash problem
Category: Roadway
Study: Evaluation of Pavement Safety Performance, Merritt et al., 2015
Star Quality Rating: | [View score details] |
Rating Points Total: | 85 |
Crash Modification Factor (CMF) | |
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Value: | 0.481 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.064 |
Crash Reduction Factor (CRF) | |
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Value: | 51.9 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 6.4 |
Applicability | |
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Crash Type: | Wet road |
Crash Severity: | All |
Roadway Types: | Not specified |
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: | All |
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 | |
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Date Range of Data Used: | |
Municipality: | |
State: | CO,KS,KY,MI,MT,SC,TN |
Country: | USA |
Type of Methodology Used: | Before/after using comparison group |
Sample Size (crashes): | 45 crashes after |
Sample Size (sites): | 35 sites before, 35 sites after |