CMF / CRF Details
CMF ID: 9840
Install centerline rumble strips
Description:
Prior Condition: No centerline rumble strips present
Category: Roadway
Study: Centerline Rumble Strips Safety Impact Evaluation - Phase 2, Guin et al., 2018
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 105 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.58 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 42 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Applicability | |
|---|---|
| Crash Type: | Fixed object,Head on,Run off road,Sideswipe |
| Crash Severity: | All |
| 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: | Undivided |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Rural |
| Traffic Volume: | |
| 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: | 2003 to 2008 |
| Municipality: | |
| State: | FL,GA |
| Country: | USA |
| Type of Methodology Used: | Before/after using comparison group |
| Sample Size (crashes): | 98 crashes before, 56 crashes after |
| Sample Size (sites): | 9 sites before, 9 sites after |
| Sample Size (site-years): | 36 site-years before, 36 site-years after |
| Sample Size (miles): | 124.46 miles before, 124.46 miles after |
| Sample Size (miles): | 497.84 mile-years before, 497.84 mile-years after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Nov 19, 2018 |
| Comments: | Applies to two-lane rural principal arterial, minor arterial, and major collector. |
