CMF / CRF Details
Convert all-way, stop-controlled intersection to mini roundabout
Countermeasure ID: 11245
Description:
Prior Condition: All-Way, Stop-Controlled (AWSC) intersection
Category: Intersection geometry
Study: Safety Effectiveness and the Role of Geometric, Traffic, and Crash History–Related Factors in Converting a Stop-Controlled Intersection to a Miniroundabout, Mishra et al., 2022
| Crash Modification Factor (CMF) |
|---|
| Value: | 3.83 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.31 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | -283 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 31 |
| Applicability |
|---|
| Crash Type: | All |
| Crash Severity: | O (property damage only) |
| Roadway Types: | All |
| Street Type: | Two-Way |
| Minimum Number of Lanes: | |
| Maximum Number of Lanes: | |
| Number of Lanes Direction: | Both Directions |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | All |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | mph |
| Speed Limit Comment: | |
| Area Type: | All |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | All |
| If countermeasure is intersection-based |
| Intersection Type: | Roadway/roadway (not interchange related) |
| Intersection Geometry: | 3-leg,4-leg |
| Traffic Control: | Stop-controlled |
| Major Road Traffic Volume: | Minimum of 5454 to Maximum of 11640 Annual Average Daily Traffic (AADT) |
| Minor Road Traffic Volume: | Minimum of 1834 to Maximum of 8590 Annual Average Daily Traffic (AADT) |
| Average Major Road Volume : | 7712 Annual Average Daily Traffic (AADT) |
| Average Minor Road Volume : | 4949 Annual Average Daily Traffic (AADT) |
| Development Details |
|---|
| Date Range of Data Used: | |
| Municipality: | |
| State: | GA,IA,MI,MN,MO,NC,VA,WA |
| Country: | USA |
| Type of Methodology Used: | |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Dec 06, 2022 |
| Comments: | |
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