CMF / CRF Details
CMF ID: 4727
Road diet (Convert 4-lane undivided road to 2-lanes plus turning lane) - 9 or more intersections
Description: Road diets (4 to 3 lane) 9 or more intersections
Prior Condition: 4 lane road
Category: Roadway
Study: Safety and Operational Analysis of 4-lane to 3-lane Conversions (Road Diets) in Michigan, Lyles et al., 2012
Star Quality Rating: | [View score details] |
Rating Points Total: | 30 |
Crash Modification Factor (CMF) | |
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Value: | 0.93 |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Crash Reduction Factor (CRF) | |
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Value: | 7 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Applicability | |
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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 | |
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Date Range of Data Used: | 1995 to 2010 |
Municipality: | |
State: | MI |
Country: | |
Type of Methodology Used: | Simple before/after |