At unsignalized intersections, both on the major street and on the minor street, there may be short turning lanes alongside the through lanes following downstream from one single lane. This combined system is termed a shared-short lane (SSL). Up to now it has only been possible to calculate the capacity of these lanes at the stop line and the capacity of the diverging point, where the turning lane diverges from the through lane. For the total average delay of the involved individual movements, there is no applicable estimation procedure. As a special case, the shared lane (SL), which is used by several movements without a separate turning lane, must also be reconsidered. This paper presents a new model for the estimation of average delays of SSL with SL as a special case at unsignalized intersections. The model is based on the analogy to standard queuing systems. The results depend on the length of the short lane. The model is validated by simulation. The results demonstrate that the outcome of the models in current highway capacity manuals may be misleading, with the risk of inaccurately classifying the level of service of an intersection. Therefore, there is an urgent need to complete the relevant procedures in highway capacity manuals by more realistic estimation procedures for the total delay at an SSL or an SL. The methods in this paper—even if they are rather complex—are recommended to be incorporated into future versions of highway capacity manuals using some simplifications.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Delays of Shared-Short Lanes at Unsignalized Intersections


    Additional title:

    Transportation Research Record


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


    Publication date :

    2019-04-04




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Capacity of Shared/Short Lanes at Unsignalized Intersections

    Wu, N. | British Library Conference Proceedings | 1997


    Lengths of Left-Turn Lanes at Unsignalized Intersections

    Chakroborty, Partha | Online Contents | 1995


    Unsignalized Intersections

    Elefteriadou, Lily | Springer Verlag | 2013


    Warrants for Exclusive Left Turn Lanes at Unsignalized Intersections and Driveways

    J. N. Ivans / A. W. Sadek / M. Zhou et al. | NTIS | 2009