CMF / CRF Details
CMF ID: 4866
Installation of passing relief lane
Description: Addition of passing relief lanes between 1.0 to 2.9 miles
Prior Condition: No Prior Condition(s)
Category: Roadway
Study: Evaluating Performance And Making Best Use of Passing Relief Lanes, Bagdade et al., 2012
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 50 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.71 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.155 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 29 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 15.5 |
| Applicability | |
|---|---|
| Crash Type: | Other |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other |
| 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: | 55 |
| Maximum Speed Limit: | 55 |
| Speed Unit: | mph |
| 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: | |
| Municipality: | |
| State: | MI |
| Country: | |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (sites): | 331 sites |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | May 01, 2013 |
| Comments: | |
