CMF / CRF Details
CMF ID: 5396
Install rectangular shaped centerline rumble strips
Description: Install rectangular shaped centerline rumble strips
Prior Condition: No centerline rumble strips
Category: Roadway
Study: Study of KDOT Policy on Lane and Shoulder Minimum Width for Application of Centerline Rumble Strips, Rys et al., 2012
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 105 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.849 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.155 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 15.15 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 15.51 |
| Applicability | |
|---|---|
| Crash Type: | Run off road |
| Crash Severity: | All |
| Roadway Types: | All |
| 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: | Minimum of 200 to Maximum of 8000 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: | 2003 to 2010 |
| Municipality: | |
| State: | KS |
| Country: | USA |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 168 crashes before, 145 crashes after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jan 09, 2014 |
| Comments: | run off road crashes |
