CMF / CRF Details
CMF ID: 9816
Install profiled thermoplastic pavement markings
Description: Profiled thermoplastic pavement markings consist of thermoplastic material with raised thermoplastic bumps creating a raised profile marking. These markings are designed to provide an improved level of vision to drivers, particularly during wet-road surface conditions. The profiled nature also provides a rumble effect for errant vehicles.
Prior Condition: flat-line thermoplastic or other standard markings
Category: Delineation
Study: Safety Evaluation of Profiled Thermoplastic Pavement Markings, Lyon et al., 2018
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 127 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 1.027 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.089 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | -2.7 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 8.9 |
| Applicability | |
|---|---|
| Crash Type: | Wet road |
| Crash Severity: | All |
| Roadway Types: | Not specified |
| Street Type: | |
| Minimum Number of Lanes: | 2 |
| Maximum Number of Lanes: | 4 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Wet road |
| Road Division Type: | All |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Rural |
| Traffic Volume: | Minimum of 120 to Maximum of 23371 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | 5881 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: | 2005 to 2014 |
| Municipality: | |
| State: | SC |
| Country: | USA |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 392 crashes before, 157 crashes after |
| Sample Size (miles): | 341 miles before, 341 miles after |
| Sample Size (miles): | 2176 mile-years before, 789 mile-years after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Oct 27, 2018 |
| Comments: | |
