This study focuses on both vehicle kinematic parameters (speed and acceleration) and behavior parameters (critical interval and follow-up time) of drivers at turbo-roundabouts. Empirical evaluations of such parameters can be helpful in calibrating traffic microsimulation models or assigning behavior parameters to closed-form capacity models in turbo-roundabouts (gap-acceptance capacity models) and are also related to evaluation of vehicles pollutant emissions. The research was based on traffic process observed in the first turbo-roundabout implemented in the city of Maribor in Slovenia. In 2016 a great number of traffic samples were taken with high-frame-rate video recordings [ > 50 frames per second (fps)]. All vehicle trajectories were obtained with the methods and algorithms typical of the digital imageprocessing technique (DIP) by filtering the discrete signal of vehicle trajectories f ( t ) i with wavelet analysis. The research results showed that vehicle speeds on entry lanes are rather moderate (below 25    km / h , 15 m prior to the Yield line), whereas accelerations usually have values inferior to 2    m / s 2 on arm lanes and to 1.5    m / s 2 on ring lanes. The critical intervals t c [distributed according to an Erlang probability distribution function (PDF)] and follow-up headways t f (distributed according to an inverse Gaussian PDF) have, on the other hand, values in ranges of t c = 4.03 5.48    s and t f = 2.52 2.71    s , respectively, according to the right- or left-turn lane and to the major or minor entry in question.


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    Title :

    Analysis of Kinematic Parameters and Driver Behavior at Turbo Roundabouts


    Contributors:


    Publication date :

    2018-03-28




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown



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