Limited priority conditions are observed in developing countries which cause the approaching through vehicles (higher priority movement) to compromise their movement in terms of speed reduction or lane changing or may be a combination of the both. This compels the vehicles to (i) experience undesirable delay, (ii) perform forced lane changes, and (iii) experience an overall flow reduction in the approaching through traffic stream. In the present study, these effects have been studied in detail. Multiple linear regressions have been performed to develop mathematical equations and have been validated using field data. Zone concept has been introduced in the present study to account for the non-lane-based movement of vehicles. Markov chain and N-Curve are used to study the lane changing pattern and reduction in flow, respectively. Area occupancy has been used as a measure of effectiveness to define the LOS categories for median opening area using K-mean clustering.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Operational effects of U-turns at median opening


    Contributors:

    Published in:

    Transportation Letters ; 14 , 6 ; 565-577


    Publication date :

    2022-07-03


    Size :

    13 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown





    Operational Effects of U-Turns as Alternatives to Direct Left-Turns

    Liu, P. / Lu, J. J. / Zhou, H. et al. | British Library Online Contents | 2007


    Safety of U-Turns at Unsignalized Median Openings

    I. B. Potts / D. W. Harwood / D. J. Torbic et al. | NTIS | 2004


    Safety of U-Turns at Unsignalized Median Openings

    Levinson, Herbert S. / Potts, Ingrid B. / Harwood, Douglas W. et al. | Transportation Research Record | 2005


    Capacity of Median U-Turns Using Traffic Simulation

    Al-Obaedi, Jalal T. S. | Springer Verlag | 2021