CMF / CRF Details
CMF ID: 9089
Install a combination of shoulder rumble stripes, shoulder widening (from 0 to 2 ft) and resurface pavement
Description:
Prior Condition: No treatment
Category: Shoulder treatments
Study: Safety Performance of Shoulder Rumble Stripes on Rural Roadways, Zhao et al, 2017
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 75 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.93 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.055 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 7 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 5.5 |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | A (serious injury),B (minor injury),C (possible injury),O (property damage only) |
| 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: | 2004 to 2014 |
| Municipality: | |
| State: | MO |
| Country: | |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 1228 crashes before, 372 crashes after |
| Sample Size (sites): | 172 sites before, 172 sites after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jan 17, 2018 |
| Comments: | Severity = ABCO on KABCO scale |
