CMF / CRF Details
CMF ID: 11308
Install Offset Left-Turn Lanes and Flashing Yellow Arrow (FYA) Signals
Description:
Prior Condition: Signalized Intersection without Offset Left-Turn Lanes
Category: Intersection geometry
Study: Safety Evaluation of Offset Left-Turn Lanes and FYA Signals at Signalized Intersections on Multi-lane Divided Highways in Alabama, Biswas et al., 2023
| Star Quality Rating: | Cannot Be Rated (Insufficient Information) |
| Rating Points Total: | 0 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.57 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 43 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Applicability | |
|---|---|
| Crash Type: | Left turn |
| Crash Severity: | All |
| Roadway Types: | All |
| Street Type: | Two-Way |
| Minimum Number of Lanes: | 4 |
| Maximum Number of Lanes: | |
| Number of Lanes Direction: | Both Directions |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | Divided by Median |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Not specified |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | All |
| If countermeasure is intersection-based | |
| Intersection Type: | Roadway/roadway (not interchange related) |
| Intersection Geometry: | 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: | 2010 to 2020 |
| Municipality: | |
| State: | AL |
| Country: | USA |
| Type of Methodology Used: | |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Dec 12, 2023 |
| Comments: | |
