Performance of single-lane roundabouts with an adjacent slip lane for right turns is evaluated under a yield exit control scenario and varying bus traffic percentages. VISSIM microsimulation assessment considers experimental origin-destination (O-D) balanced flow scenarios (total traffic flow into and out of every roundabout approach is the same) with four different right-turning bus traffic percentages (low, moderate, high, and all compared with no buses). Simulated slip lane right-turning traffic volumes range from 50 to 500 vehicles per hour. Results indicate that average delay of a roundabout with slip lane has a nonlinear relationship with slip lane volumes and is sensitive to changing bus traffic percentages, before oversaturation occurs. As expected, results indicate that a yield slip lane exit type significantly reduces total roundabout average delay, compared with having no slip lane. Finally, results suggest theoretical threshold values at which the use of a slip lane is demonstrably beneficial as bus traffic percentages change.


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    Title :

    Experimental Analysis in VISSIM of Single-Lane Roundabout Slip Lane under Varying Bus Traffic Percentages


    Contributors:

    Conference:

    Third International Conference on Urban Public Transportation Systems ; 2013 ; Paris, France



    Publication date :

    2013-10-09




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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