CMF / CRF Details
Install cable median barrier
Countermeasure ID: 5449
Description: Install cable median barrier
Prior Condition: No Cable Median Barrier
Category: Roadside
Study: Cable Median Barrier Program in Washington State, Olson et al. 2013, 2013
Study Type: Project Report
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 50 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.31 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.091 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 69 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 9.1 |
| Applicability | |
|---|---|
| Crash Type: | Other |
| Crash Severity: | A (serious injury) |
| Roadway Types: | Principal Arterial Other Freeways and Expressways |
| Street Type: | |
| Minimum Number of Lanes: | |
| Maximum Number of Lanes: | |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | Divided by Median |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Not specified |
| Traffic Volume: | Minimum of 10000 to Maximum of 180000 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | |
| Time of Day: | All |
| If countermeasure is intersection-based | |
| Intersection Type: | |
| Intersection Geometry: | |
| Traffic Control: | |
| Major Road Traffic Volume: | |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | 1995 to 2011 |
| Municipality: | |
| State: | WA |
| Country: | USA |
| Type of Methodology Used: | Simple before/after |
| Sample Size (crashes): | 45 crashes before, 16 crashes after |
