A signalized intersection typically operates under both saturated and undersaturated traffic flow conditions at different times of the day. When an intersection operates under saturated flow conditions, its ability to dissipate traffic becomes a primary matter of concern. On the other hand, safety is often the major concern due to higher vehicular travel speeds associated with undersaturated flow conditions. The minimum corner clearance distances required under the two different flow conditions are not the same. To be effective, minimum corner clearances must be set such that the needs under both types of flow conditions are satisfied. Existing guidelines for minimum corner clearances were reviewed, and none were found to address the capacity issue. A new model designed to meet both capacity and safety needs is proposed. The model produces a refined minimum corner clearance distance by applying a set of adjustment factors to an initial minimum corner clearance, a procedure similar to that of the familiar Highway Capacity Manual for adjusting the ideal saturation flow rate. Unlike existing guidelines, the proposed model is flexible, is much less discrete for continuous variables, and can easily incorporate as many factors affecting corner clearance as needed.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Model for Minimum Driveway Corner Clearances at Signalized Intersections


    Additional title:

    Transportation Research Record


    Contributors:
    Long, Gary (author) / Gan, Cheng-Tin (author)


    Publication date :

    1997-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Model for Minimum Driveway Corner Clearances at Signalized Intersections

    Long, G. / Gan, C.-T. / National Research Council | British Library Conference Proceedings | 1997



    Operational Impacts of Indirect Driveway Left-Turn Treatment at Signalized Intersections

    Guo, Tangyi / Liu, Pan / Liu, Yingshun et al. | ASCE | 2011


    Effects of Inadequate Driveway Corner Clearances on Traffic Operations, Safety, and Capacity

    Gan, Cheng-Tin / Long, Gary | Transportation Research Record | 1997


    Effects of Inadequate Driveway Corner Clearances on Traffic Operations, Safety, and Capacity

    Gan, C.-T. / Long, G. / National Research Council | British Library Conference Proceedings | 1997