CMF / CRF Details
CMF ID: 10644
Install wider longitudinal pavement markings
Description:
Prior Condition: 4 in. wide longitudinal pavement markings
Category: Delineation
Study: Investigating Safety Effects of Wider Longitudinal Pavement Markings, Hussein et al., 2020
Star Quality Rating: | [View score details] |
Rating Points Total: | 140 |
Crash Modification Factor (CMF) | |
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Value: | 0.725 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.095 |
Crash Reduction Factor (CRF) | |
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Value: | 27.5 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 9.5 |
Applicability | |
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Crash Type: | All |
Crash Severity: | All |
Roadway Types: | All |
Street Type: | |
Minimum Number of Lanes: | |
Maximum Number of Lanes: | |
Number of Lanes Direction: | |
Number of Lanes Comment: | |
Crash Weather: | Not specified |
Road Division Type: | All |
Minimum Speed Limit: | |
Maximum Speed Limit: | |
Speed Unit: | |
Speed Limit Comment: | |
Area Type: | Rural |
Traffic Volume: | |
Average Traffic Volume: | 6398 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: | 2008 to 2015 |
Municipality: | British Columbia |
State: | notusa |
Country: | Canada |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (crashes): | 198 crashes before, 110 crashes after |
Sample Size (sites): | 10 sites before, 10 sites after |