CMF / CRF Details
CMF ID: 2812
Install dynamic advance intersection warning system
Description: Install dynamic advance intesrection warning signs to provide real-time traffic condition (VEHICLES ENTERING WHEN FLASHING).
Prior Condition: No Prior Condition(s)
Category: Advanced technology and ITS
Study: NCHRP Report 650 - Median Intersection Design for Rural High-Speed Divided Highways, Maze et al., 2010
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 30 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.33 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.12 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 67 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 12.1 |
| Applicability | |
|---|---|
| Crash Type: | Angle |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other Freeways and Expressways |
| Street Type: | |
| Minimum Number of Lanes: | 4 |
| Maximum Number of Lanes: | 4 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | Divided by Median |
| Minimum Speed Limit: | 55 |
| Maximum Speed Limit: | 55 |
| Speed Unit: | mph |
| Speed Limit Comment: | |
| Area Type: | Rural |
| 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: | Stop-controlled |
| Major Road Traffic Volume: | Minimum of 7700 to Maximum of 10100 Annual Average Daily Traffic (AADT) |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | 10100 Annual Average Daily Traffic (AADT) |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | 1990 to 2004 |
| Municipality: | Columbus County |
| State: | NC |
| Country: | USA |
| Type of Methodology Used: | Simple before/after |
| Sample Size (crashes): | 30 crashes before, 13 crashes after |
