CMF / CRF Details
CMF ID: 6104
Install shoulder rumble strips
Description:
Prior Condition: No Rumble Strips on Shoulder
Category: Shoulder treatments
Study: Effectiveness of various safety improvements in reducing crashes on Wyoming roadways, Zebulon C. Coulter Khaled Ksaibati, 2013
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 20 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 1 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.07 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 0 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 7 |
| Applicability | |
|---|---|
| Crash Type: | Run off road |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Interstate |
| 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: | Rural |
| Traffic Volume: | Minimum of 7000 to Maximum of 13,500 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: | 2000 to 2010 |
| Municipality: | |
| State: | WY |
| Country: | USA |
| Type of Methodology Used: | Simple before/after |
| Sample Size (crashes): | 453 crashes before, 454 crashes after |
| Sample Size (sites): | 34 sites before, 34 sites after |
| Sample Size (site-years): | 170 site-years before, 170 site-years after |
| Sample Size (miles): | 224 miles before, 224 miles after |
| Sample Size (miles): | 2237 mile-years before, 2237 mile-years after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Mar 11, 2015 |
| Comments: | |
