CMF / CRF Details
CMF ID: 11162
Protected/permissive to protected-only left turn phasing
Description:
Prior Condition: Protected/Permitted Left-Turn Signal Phase
Category: Intersection traffic control
Study: Safety and Operational Effectiveness of Protected Only Versus Protected/ Permitted Left-Turn Signal Phase, Md Asaduzzaman, Raju Thapa, and Julius A. Codjoe, 2022
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 75 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.334 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.198 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 66.6 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 19.8 |
| Applicability | |
|---|---|
| Crash Type: | Left turn |
| Crash Severity: | All |
| Roadway Types: | Not specified |
| 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: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Not specified |
| If countermeasure is intersection-based | |
| Intersection Type: | Roadway/roadway (not interchange related) |
| Intersection Geometry: | 3-leg,4-leg |
| Traffic Control: | Signalized |
| Major Road Traffic Volume: | |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | 2015 to 2019 |
| Municipality: | |
| State: | LA |
| Country: | USA |
| Type of Methodology Used: | |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Aug 25, 2022 |
| Comments: | |
