CMF / CRF Details
CMF ID: 10642
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) | |
|---|---|
| Value: | 0.889 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.052 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 11.1 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 5.2 |
| Applicability | |
|---|---|
| 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: | 13248 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: | 2008 to 2015 |
| Municipality: | Alberta |
| State: | notusa |
| Country: | Canada |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 1460 crashes before, 911 crashes after |
| Sample Size (sites): | 23 sites before, 23 sites after |
