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Presentation | 2013

Development of Left-Turn Warrants for Unsignalized Intersections

  • Authored by:  William L. Eisele
  • Event:  2012 National Conference on Access Management

Bill Eisele
Development of Left-Turn Warrants for Unsignalized Intersections
TTI

Purpose of NCHRP Project 3-91

  • Develop objective and clear process for selection of left-turn lanes at unsignalized intersections
  • Provide guidance on the design of left-turn lanes

Conclusions

  • Left-turn lane warrants developed for:
    • Rural two-lane highways
    • Rural four-lane highways
    • Urban and suburban (two or four-lane) roadways
  • Methodology can be used with local cost values
  • 2012 TRB paper
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