CMF / CRF Details
CMF ID: 4721
Road diet (Convert 4-lane undivided road to 2-lanes plus turning lane) - low driveway density
Description:
Road diets (4 to 3 lane) with low driveway density
Prior Condition: 4 lane road
Category: Roadway
| Crash Modification Factor (CMF) |
|---|
| Value: | 1.07 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Crash Reduction Factor (CRF) |
|---|
| Value: | -7 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Applicability |
|---|
| Crash Type: | All |
| Crash Severity: | All |
| Roadway Types: | Not specified |
| Street Type: | |
| Minimum Number of Lanes: | 3 |
| Maximum Number of Lanes: | 4 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | |
| Traffic Volume: | Minimum of 3510 to Maximum of 17020 Average Daily Traffic (ADT) |
| Average Traffic Volume: | 10652 Average Daily Traffic (ADT) |
| Time of Day: | |
| 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: | 1995 to 2010 |
| Municipality: | |
| State: | MI |
| Country: | |
| Type of Methodology Used: | Simple before/after |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | May 01, 2013 |
| Comments: | For low driveway density areas. The number of crashes in the after period were not reported in this study, however, they have been recorded as 300 to give 10 points as a beneift of doubt for one or more of the following: (1) number of miles/sites in the reference/treatment group, (2) number of crashes in the references/treatment group, (3) reporting AADTs for the aggregate dataset but not for the disaggragate dataset used for CMF development. |
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