CMF / CRF Details
CMF ID: 11304
Install Median Opening Treatments at Unsignalized Intersections
Description: The median opening treatments covered in this countermeasure include: stop line, stop sign, and double yellow line; and yield lines and yield signs and double yellow line.
Prior Condition: No median treatments
Category: Alignment
Study: Development of Crash Modification Factor for Low-cost Median Opening Treatments at Unsignalized Intersections of Rural Divided Highways, Priyanka, 2022
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 40 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.7 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.22 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 30 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 22 |
| Applicability | |
|---|---|
| Crash Type: | Left turn |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other |
| Street Type: | Two-Way |
| Minimum Number of Lanes: | 4 |
| Maximum Number of Lanes: | 4 |
| Number of Lanes Direction: | Both Directions |
| Number of Lanes Comment: | |
| Crash Weather: | All |
| Road Division Type: | Divided by Median |
| Minimum Speed Limit: | 55 |
| Maximum Speed Limit: | 65 |
| Speed Unit: | mph |
| 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: | Other |
| Major Road Traffic Volume: | |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | 2016 to 2020 |
| Municipality: | |
| State: | AL |
| Country: | USA |
| Type of Methodology Used: | |
