Traffic Safety Evaluation at J-turns in Minnesota Status: CompleteReport Date: 03/04/2024 Summary: Between 2010 and 2022, 83 J-turn intersections were installed on Minnesota Department of Transportation (MnDOT) roadways. The J-turn is an alternative intersection layout that is intended to provide safety benefits by limiting the number of points within an intersection that two or more vehicle paths might intersect. Before-after analyses at J-turns and control sites were conducted and compared. With the installation of a J-turn, the analyses found decreases in fatal and serious injury crashes, angle crashes, and fatal and serious injury angle crashes. The large decreases in severe crashes at J-turn locations indicate the J-turn can be an effective safety treatment. The analysis also found J-turns have lower crash rates for key crash types as compared to low volume interchanges and rural, high-speed signalized intersections. Final Deliverables: Traffic Safety Evaluation at J-turns in Minnesota (Report #2024-05) Evaluating the Traffic Safety Benefits of J-Turns in Minnesota (Research Summary) Related Materials: Evaluating the Traffic Safety Benefits of J-turns in Minnesota (Blog Post) Related Research:
