CMF / CRF Details
CMF ID: 5313
Install centerline and shoulder rumble strips
Description: Milled or rolled rumble strips.
Prior Condition: No Rumble Strips
Category: Roadway
Study: Performance Analysis of Centerline and Shoulder Rumble Strips Installed in Combination in Washington State, D. Olson, M. Sujka, and B. Manchas, 2013
| Star Quality Rating: |
[View score details]
|
| Rating Points Total: | 50 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.44 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.142 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 56 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 14.2 |
| Applicability | |
|---|---|
| Crash Type: | Head on,Run off road,Sideswipe |
| Crash Severity: | K (fatal),A (serious injury) |
| Roadway Types: | Not specified |
| Street Type: | |
| Minimum Number of Lanes: | 2 |
| Maximum Number of Lanes: | 2 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Rural |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Not specified |
| 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: | 2002 to 2010 |
| Municipality: | |
| State: | WA |
| Country: | |
| Type of Methodology Used: | Simple before/after |
| Sample Size (crashes): | 48 crashes before, 12 crashes after |
