CMF / CRF Details
CMF ID: 6947
Increase median shoulder width
Description:
Increase median shoulder width
Prior Condition: Median shoulder with unspecified width
Category: Shoulder treatments
| Crash Modification Factor (CMF) |
|---|
| Value: | 0.899 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.041 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | 10.1 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 4.1 |
| Applicability |
|---|
| Crash Type: | Fixed object |
| Crash Severity: | All |
| Roadway Types: | Not specified |
| Street Type: | |
| Minimum Number of Lanes: | 4 |
| Maximum Number of Lanes: | 4 |
| 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: | |
| 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: | 2002 to 2007 |
| Municipality: | |
| State: | MO |
| Country: | USA |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (miles): | 301 miles |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Nov 01, 2015 |
| Comments: | This CMF applies to a one foot increase in median shoulder width for fixed-object crashes on four-lane non-freeways with traversable medians. |
[View score details]