Traffic Safety Evaluation at J-turns in Minnesota

Details

• Alternative Title:
  Traffic Safety Evaluation at J-Turn Intersections in Minnesota
• Creators:
  Moreland, Max ; Leuer, Derek ; Saari, Ian
• Corporate Creators:
  Minnesota. Department of Transportation. Office of Traffic Engineering
• Corporate Contributors:
  Minnesota. Department of Transportation. Office of Research & Innovation
• Subject/TRT Terms:
  • Restricted crossing U turn intersections
  • Traffic safety
  • Analysis
  • Traffic crashes
  • J-Turn
• Publication/ Report Number:
  2024-05
• Resource Type:
  Tech Report
• Geographical Coverage:
  Minnesota ; United States
• Edition:
  Final Report
• Corporate Publisher:
  Minnesota. Department of Transportation
• Abstract:
  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.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/73842/dot_73842_DS1.pdf
• File Type:
  [PDF - 2.92 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:7797565549715def812ef937b788d802a6f5d64ec1a0736faf69a3de1a669453