CMF / CRF Details
Convert intersection to restricted crossing U-turn (RCUT) intersection
Countermeasure ID: 10378
Description: The RCUT, also referred to as the superstreet intersection or J-turn intersection. The conversion is for either signalized or stop-controlled.
Prior Condition: Both signalized and stop-controlled intersections
Category: Intersection geometry
Study: Investigating Safety Impact of Center Line Rumble Strips, Lane Conversion, Roundabout and J-Turn Features on Louisiana Highways, Sun and Rahman, 2019
| Crash Modification Factor (CMF) |
|---|
| Value: | 0.69 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.05 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | 31 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 5 |
| Applicability |
|---|
| Crash Type: | All |
| Crash Severity: | All |
| Roadway Types: | Not specified |
| Street Type: | |
| Minimum Number of Lanes: | 4 |
| Maximum Number of Lanes: | 6 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | Divided by Median |
| Minimum Speed Limit: | 55 |
| Maximum Speed Limit: | |
| Speed Unit: | mph |
| Speed Limit Comment: | > = 55 mph |
| Area Type: | All |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Not specified |
| If countermeasure is intersection-based |
| Intersection Type: | Roadway/roadway (not interchange related) |
| Intersection Geometry: | No values chosen. |
| Traffic Control: | |
| Major Road Traffic Volume: | Minimum of 7067 to Maximum of 59833 Annual Average Daily Traffic (AADT) |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details |
|---|
| Date Range of Data Used: | 2008 to 2016 |
| Municipality: | |
| State: | LA |
| Country: | USA |
| Type of Methodology Used: | Other before/after |
| Sample Size (crashes): | 328 crashes before, 226 crashes after |
| Sample Size (sites): | 10 sites before, 10 sites after |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jun 01, 2020 |
| Comments: | Only intersection crashes |
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