CMF / CRF Details
CMF ID: 11230
Road diet (Convert 4-lane undivided road to 2-lanes plus turning lane)
Description:
Prior Condition: Four-lane undivided road
Category: Roadway
Study: Safety Effectiveness of the Road Diet Treatment in Rhode Island, Zhou et al., 2022
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 105 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.71 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.08 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 29 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 8 |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | All |
| Roadway Types: | All |
| Street Type: | Two-Way |
| Minimum Number of Lanes: | |
| Maximum Number of Lanes: | |
| Number of Lanes Direction: | Both Directions |
| Number of Lanes Comment: | |
| Crash Weather: | All |
| Road Division Type: | Undivided |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | mph |
| Speed Limit Comment: | |
| Area Type: | All |
| Traffic Volume: | Minimum of 3390 to Maximum of 22500 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | 13459 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 2019 |
| Municipality: | |
| State: | RI |
| Country: | USA |
| Type of Methodology Used: | |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Aug 25, 2022 |
| Comments: | |
