Two transportation engineers have found five unconventional left-turn lanes that can relieve congestion and reduce traffic accidents. They presented overviews and feasibility studies of the median U-turn, bow tie, superstreet, jug handle, and continuous flow intersection at the Urban Street Symposium in Dallas, Texas, in July 1999. Tests performed on a median U-turn lane along a 2.5 mi (4 km) corridor in Detroit, Michigan, were found the most effective design for moving traffic quickly through intersections. Although the bow tie design is not yet in use, computer simulations have shown it to be effective as median U-turns based on actual traffic data.

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  • Corporate Authors:

    Civil Engineering News, Incorporated

    1255 Roberts Boulevard, Suite 230
    Kennesaw, GA  United States  30144
  • Publication Date: 1999-10


  • English

Media Info

  • Features: Figures;
  • Pagination: p. 28
  • Serial:
    • Civil Engineering News
    • Volume: 11
    • Issue Number: 9
    • Publisher: Civil Engineering News, Incorporated
    • ISSN: 1051-9629

Subject/Index Terms

Filing Info

  • Accession Number: 00770354
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 25 1999 12:00AM