CMF / CRF Details
Install restricted crossing U-turn intersections
Countermeasure ID: 10675
Description: The Restricted Crossing U-Turn (RCUT), also known as a “superstreet” or “J-turn”, is an innovative intersection design that improves safety and operations by changing how minor road traffic crosses or turns left at a major road. The RCUT does not change any of the movements that are possible from the major road. It reduces conflict points by restricting left turns and through movements from the minor approach at the main RCUT intersection. The RCUT design channels the traffic from a minor approach to make a right turn and then a U-turn from the major road, simplifying interactions and minimizing high-risk conflict points.
Prior Condition: No Prior Condition(s)
Category: Intersection geometry
Study Type: Journal Article/Book
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 85 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 1.009 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.09656 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | -0.9 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 9.656 |
| Applicability | |
|---|---|
| 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: | Urban and suburban |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | All |
| If countermeasure is intersection-based | |
| Intersection Type: | Roadway/roadway (not interchange related) |
| Intersection Geometry: | 3-leg,4-leg |
| Traffic Control: | Signalized |
| Major Road Traffic Volume: | Minimum of 9700 to Maximum of 100467 Annual Average Daily Traffic (AADT) |
| Minor Road Traffic Volume: | Minimum of 1000 to Maximum of 18218 Annual Average Daily Traffic (AADT) |
| Average Major Road Volume : | 38138 Annual Average Daily Traffic (AADT) |
| Average Minor Road Volume : | 6828 Annual Average Daily Traffic (AADT) |
| Development Details | |
|---|---|
| Date Range of Data Used: | |
| Municipality: | |
| State: | AL,MD,MI,NC,OH,TX |
| Country: | |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (crashes): | 2805 crashes |
| Sample Size (sites): | 42 sites |
