Estimation of the capacity of mini-roundabouts is under discussion. Existing methods treat mini-roundabouts as analogous to larger roundabouts, assuming independence between operation of the entries. They fail to acknowledge the specific way that traffic operates at these narrow intersections. This study proposed a new model, which aimed to accommodate the peculiarities of mini-roundabouts: priority for upstream entry, capacity increasing effects of exiting vehicles, and heavy vehicle operation. The model resulted in a set of equations that can be solved iteratively. It was applied to a set of examples in which the model parameters were estimated according to existing guidelines. Test calculations showed: compared to the current German guidelines the model leads to a reduced total intersection capacity. Further calibration and tests for practicability are recommended.


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    Title :

    Capacity of Mini-Roundabouts: A New Model


    Additional title:

    Transportation Research Record


    Contributors:
    Brilon, Werner (author) / Wu, Ning (author)


    Publication date :

    2021-08-08




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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