CMF / CRF Details
CMF ID: 10219
Reduce lane width from 12 ft to less than 12 ft
Description: Reduce average lane width from at least 12 ft wide to less than 12 ft wide
Prior Condition: Average lane width is 12 ft
Category: Roadway
Study: Estimation of bicycle crash modification factors (CMFs) on urban facilities using zero inflated negative binomial models, Raihan et al., 2019
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 65 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 1.72 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.58 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | -72 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 58 |
| Applicability | |
|---|---|
| Crash Type: | Vehicle/bicycle |
| Crash Severity: | All |
| 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: | Divided by Median |
| Minimum Speed Limit: | 30 |
| Maximum Speed Limit: | 55 |
| Speed Unit: | mph |
| Speed Limit Comment: | |
| Area Type: | Urban |
| Traffic Volume: | Minimum of 1300 to Maximum of 42000 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | 12017 Annual Average Daily Traffic (AADT) |
| 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: | 2011 to 2014 |
| Municipality: | |
| State: | FL |
| Country: | USA |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (crashes): | 178 crashes |
| Sample Size (miles): | 399 miles |
| Sample Size (mile-years): | 1596 mile-years |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Dec 07, 2019 |
| Comments: | This CMF applies to vehicle/bicycle crashes on urban two-lane divided segments. |
