CMF / CRF Details
CMF ID: 3068
Gravel right shoulder
Description: Gravel right shoulder compared to no right shoulder, earth, or paved right shoulder.
Prior Condition: No Prior Condition(s)
Category: Shoulder treatments
Study: An Empirical Bayes Model to Assess Deer-Vehicle Crash Safety in Urban Areas in Iowa, Baird et al., 2011
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 95 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 4.21 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 1.2 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | -321.2 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 120 |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other Freeways and Expressways |
| Street Type: | |
| Minimum Number of Lanes: | 2 |
| Maximum Number of Lanes: | 7 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | 65 |
| Speed Unit: | mph |
| Speed Limit Comment: | Below 55 - 65 mph |
| Area Type: | Urban |
| 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 2008 |
| Municipality: | Dubuque, Iowa City, Waterloo and Cedar Falls |
| State: | IA |
| Country: | USA |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (crashes): | 634 crashes |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jul 15, 2011 |
| Comments: | For deer/animal crashes. |
