CMF / CRF Details

CMF ID: 10385

Convert intersection to restricted crossing U-turn (RCUT) intersection

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

 
Star Quality Rating: 3 Stars   [View score details]
Rating Points Total: 90
Crash Modification Factor (CMF)
Value: 1.07
Adjusted Standard Error:
Unadjusted Standard Error: 0.339
Crash Reduction Factor (CRF)
Value: -7   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 33.9
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 36367 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: Before/after using empirical Bayes or full Bayes
Sample Size (crashes): 17 crashes before, 17 crashes after
Sample Size (sites): 2 sites before, 2 sites after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Jun-01-2020
Comments: CMF partial RCUT with one minor street. Crashes for RCUT section (including U-turns). SPF used for this analysis came from the 2010 HSM