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) | |
|---|---|
| Value: | 1.028 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.063 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | -2.8 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 6.3 |
| Applicability | |
|---|---|
| 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 | |
|---|---|
| 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 | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Nov 10, 2016 |
| Comments: | |
