The objective of the study was to update the guidelines to be considered when determining whether left-turn phasing should be used and the appropriate type of phasing to use. Emphasis was placed on high speed areas. There were 264 intersections included in the study with data obtained for 518 approaches at these intersections. The data included accidents and characteristics of the intersection. Traffic conflict data were collected. Simulation models were used to estimate delays. Recommendatins were made concerning guidelines to consider when decising whether to install left turn phasing and whether to use protected-only or protected/permitted phasing. Variables considered included accident history, traffic volume and delay, traffic speed, number of left-turn lanes, number of opposing lanes, sight distance, intersection geometrics, left-turn volume, and opposing volume.


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    Title :

    Guidelines for the Installation of Left-Turn Phasing


    Contributors:
    K. R. Agent (author) / N. Stamatiadis (author) / B. Dyer (author)

    Publication date :

    1995


    Size :

    102 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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