CMF / CRF Details
CMF ID: 107
Install snowplowable, permanent raised pavement markers (Radius greater than 1640 ft)
Description: Install snowplowable, permanent raised pavement markers (Radius greater than 1640 ft)
Prior Condition: No Prior Condition(s)
Category: Delineation
Study: NCHRP Report 518: Safety Evaluation of Permanent Raised Pavement Markers, Bahar et al., 2004
Star Quality Rating: | [View score details] |
Rating Points Total: | 140 |
Crash Modification Factor (CMF) | |
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Value: | 0.76 |
Adjusted Standard Error: | 0.08 |
Unadjusted Standard Error: | 0.07 |
Crash Reduction Factor (CRF) | |
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Value: | 24 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | 8 |
Unadjusted Standard Error: | 7 |
Applicability | |
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Crash Type: | Nighttime |
Crash Severity: | All |
Roadway Types: | Not Specified |
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Minimum Number of Lanes: | 2 |
Maximum Number of Lanes: | 2 |
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Crash Weather: | Not specified |
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Area Type: | Rural |
Traffic Volume: | Minimum of 15001 to Maximum of 20000 Annual Average Daily Traffic (AADT) |
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If countermeasure is intersection-based | |
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Development Details | |
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Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |