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
| 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: | |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Dec 12, 2023 |
| Comments: | This CMF is for unsignalized (stop-controlled and yield) intersections.
All the study locations are on four-lane divided highways with left-turn bays on the major roads. |
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