CMF / CRF Details
CMF ID: 7965
Install permeable friction course (PFC)
Description: Safety effect of permeable friction course (PFC) in wet weather
Prior Condition: No PFC course
Category: Roadway
Study: A fully Bayesian before-after analysis of permeable friction course (PFC) pavement wet weather safety, Buddhavarapu et al., 2015
Star Quality Rating: | [View score details] |
Rating Points Total: | 100 |
Crash Modification Factor (CMF) | |
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Value: | 1.028 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.063 |
Crash Reduction Factor (CRF) | |
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Value: | -2.8 (This value indicates an increase in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 6.3 |
Applicability | |
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Crash Type: | Wet road |
Crash Severity: | All |
Roadway Types: | All |
Street Type: | |
Minimum Number of Lanes: | 2 |
Maximum Number of Lanes: | 8 |
Number of Lanes Direction: | |
Number of Lanes Comment: | |
Crash Weather: | Wet road |
Road Division Type: | All |
Minimum Speed Limit: | 40 |
Maximum Speed Limit: | 75 |
Speed Unit: | mph |
Speed Limit Comment: | |
Area Type: | Not specified |
Traffic Volume: | Minimum of 2012 to Maximum of 42888 Annual Average Daily Traffic (AADT) |
Average Traffic Volume: | 12755 Annual Average Daily Traffic (AADT) |
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: | 2003 to 2011 |
Municipality: | |
State: | TX |
Country: | USA |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (sites): | 43 sites before, 43 sites after |
Sample Size (miles): | 245 miles before, 245 miles after |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Nov 10, 2016 |
Comments: |