CMF / CRF Details
CMF ID: 9658
Convert at-grade intersections to Diverging Diamond Interchanges
Description:
Prior Condition: At-grade signalized intersections
Category: Interchange design
Study: Safety Evaluation of Diverging Diamond Interchanges Design for Intersections in Minnesota, Walls et al., 2018
Star Quality Rating: | [View score details] |
Rating Points Total: | 85 |
Crash Modification Factor (CMF) | |
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Value: | 0.42 |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Crash Reduction Factor (CRF) | |
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Value: | 58 (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: | All |
Street Type: | |
Minimum Number of Lanes: | |
Maximum Number of Lanes: | |
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: | |
Traffic Volume: | |
Average Traffic Volume: | |
Time of Day: | All |
If countermeasure is intersection-based | |
Intersection Type: | Not specified |
Intersection Geometry: | 4-leg |
Traffic Control: | Signalized |
Major Road Traffic Volume: | Minimum of 28000 to Maximum of 40000 Annual Average Daily Traffic (AADT) |
Minor Road Traffic Volume: | Minimum of 3000 to Maximum of 18000 Annual Average Daily Traffic (AADT) |
Average Major Road Volume : | 33638 Annual Average Daily Traffic (AADT) |
Average Minor Road Volume : | 11088 Annual Average Daily Traffic (AADT) |
Development Details | |
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Date Range of Data Used: | 2006 to 2015 |
Municipality: | |
State: | MN |
Country: | |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (crashes): | 304 crashes before, 37 crashes after |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Oct 27, 2018 |
Comments: |