CMF / CRF Details
CMF ID: 3112
Convert two-way (without flashing beacons) to all-way stop control (with flashing beacons)
Description: Conversion from two-way stop sign control without flashing beacons to all-way stop sign control with flashing beacons.
Prior Condition: Two-way stop sign control without flashing beacons.
Category: Intersection traffic control
Study: Evaluation of the Conversion from Two-Way Stop Sign Control to All-Way Stop Sign Control at 53 Locations in North Carolina, Simpson and Hummer, 2010
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 75 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.601 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.201 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 39.9 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 20.1 |
| Applicability | |
|---|---|
| Crash Type: | Angle |
| Crash Severity: | All |
| Roadway Types: | All |
| Street Type: | |
| Minimum Number of Lanes: | 1 |
| Maximum Number of Lanes: | 1 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | Undivided |
| Minimum Speed Limit: | 35 |
| Maximum Speed Limit: | 55 |
| Speed Unit: | mph |
| Speed Limit Comment: | |
| Area Type: | All |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Not specified |
| If countermeasure is intersection-based | |
| Intersection Type: | |
| Intersection Geometry: | 4-leg |
| Traffic Control: | Stop-controlled |
| Major Road Traffic Volume: | Minimum of 1340 to Maximum of 9900 |
| Minor Road Traffic Volume: | Minimum of 1340 to Maximum of 9900 |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | 1990 to 2009 |
| Municipality: | |
| State: | NC |
| Country: | |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jul 15, 2011 |
| Comments: | Crash type was 'ran stop sign'. |
