CMF / CRF Details
CMF ID: 4106
Convert 12-ft inside and outside lanes to 12-ft inside lane and X-ft outside lane
Description: Urban four-lane roadway with raised median with 12-ft inside and outside lanes converted to asymmetric cross-section with 12-ft inside lane and X-ft outside lane.
Prior Condition: No Prior Condition(s)
Category: Roadway
Study: Developing Lane Width Crash Modification Factors for Urban Multilane Roadways with Curb-and-Gutter and Asymmetric Lanes, Mbatta et al., 2012
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 120 |
| Crash Modification Factor (CMF) | |
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| Value: |  |
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| Unadjusted Standard Error: | |
| Crash Reduction Factor (CRF) | |
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| Value: |  |
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| Applicability | |
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| Crash Type: | All |
| Crash Severity: | O (property damage only) |
| 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: | Urban |
| Traffic Volume: | Minimum of 25100 to Maximum of 52500 Average Daily Traffic (ADT) |
| Average Traffic Volume: | 37510 Average Daily Traffic (ADT) |
| 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 2009 |
| Municipality: | |
| State: | FL |
| Country: | United States |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (crashes): | 643 crashes |
| Other Details | |
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| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Nov 01, 2012 |
| Comments: | |
