CMF / CRF Details
CMF ID: 8100
Upgrade existing markings to wet-reflective pavement markings
Description: This strategy involves upgrading existing markings from standard marking materials to wet-reflective markings applied as paint, tape, or thermoplastic material.
Prior Condition: Standard pavement markings
Category: Delineation
Study: Safety Evaluation of Wet Reflective Pavement Markers, Lyon et al., 2015
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 115 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.907 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.093 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 9.3 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 9.3 |
| Applicability | |
|---|---|
| Crash Type: | Nighttime,Wet road |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other Freeways and Expressways |
| Street Type: | |
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| Number of Lanes Comment: | |
| Crash Weather: | Wet road |
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| Area Type: | |
| Traffic Volume: | Minimum of 10333 to Maximum of 124214 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | 47943 Annual Average Daily Traffic (AADT) |
| Time of Day: | |
| If countermeasure is intersection-based | |
| Intersection Type: | |
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| Development Details | |
|---|---|
| Date Range of Data Used: | 1998 to 2012 |
| Municipality: | |
| State: | NC |
| Country: | |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 167 crashes after |
| Sample Size (miles): | 95 miles before, 95 miles after |
| Sample Size (miles): | 823 mile-years before, 513 mile-years after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Nov 10, 2016 |
| Comments: | |
