A particular component of two-way stop unsignalized intersection analyses as presented in the 1994 Highway Capacity Manual (HCM) is described. Specifically, advantages to minor movement capacity are evaluated where traffic flows overlap in multiple lanes. From vehicular arrival data collected by the author, it was determined that the current HCM can significantly underestimate the true potential capacity of minor movements that face multiple lanes of free-flow conflicting traffic. A modification to the HCM procedure is introduced in which an “effective” conflicting flow is calculated on the basis of “blockage” caused by individual lanes of traffic, assuming a Poisson count distribution. In every case examined (24 total), a more accurate potential capacity estimate resulted relative to that determined by the HCM procedure. The modification also resulted in a more accurate level of service in 8 of the 24 cases.


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    Title :

    Unsignalized Intersection Analysis: Effect of Overlapping Conflicting Traffic Flow on Minor Movement Potential Capacity


    Additional title:

    Transportation Research Record


    Contributors:


    Publication date :

    1997-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Unsignalized Intersection Analysis: Effect of Overlapping Conflicting Traffic Flow on Minor Movement Potential Capacity

    Fasching, C. J. / National Research Council; Transportation Research Board | British Library Conference Proceedings | 1997


    Interim materials on unsignalized intersection capacity

    National Research Council, Committee Highway Capacity and Quality of Service, USA | TIBKAT | 1991


    Dirty-Face Game Analysis on Mixed Traffic Flow at Unsignalized Intersection

    Wang, Lu ;Xie, Neng Gang ;Meng, Rui | Trans Tech Publications | 2011