CMF / CRF Details
CMF ID: 8674
Install J-Turn intersection
Description: Install J-Turn intersection
Prior Condition: At-grade intersections with full access from minor roads
Category: Intersection geometry
Study: A Study of the Traffic Safety at Reduced Conflict Intersections In Minnesota, Leuer and Fleming, 2016
Star Quality Rating: | [View score details] |
Rating Points Total: | 40 |
Crash Modification Factor (CMF) | |
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Value: | 1 |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Crash Reduction Factor (CRF) | |
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Value: | 0 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Applicability | |
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Crash Type: | Left turn |
Crash Severity: | All |
Roadway Types: | Not specified |
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: | |
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: | 2009 to 2015 |
Municipality: | |
State: | MN |
Country: | |
Type of Methodology Used: | Simple before/after |
Sample Size (crashes): | 5 crashes before, 5 crashes after |
Sample Size (sites): | 8 sites before, 8 sites after |
Sample Size (site-years): | 19 site-years before, 19 site-years after |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Nov 06, 2017 |
Comments: | The study used crashes within 250 feet of the intersection, both mainlines and minor roads. |