Current methodologies for estimation of intersection capacity are based mainly on the concept of saturation flow. Saturation flow is the steady maximum queue discharge rate after the green light is turned on. According to the U.S. Highway Capacity Manual, this steady maximum rate is generally reached after the fourth queuing vehicle is discharged. Two recent studies conducted in Hawaii and Taiwan, however, have found that queue discharge headways tend to undergo compression for a considerable time as more vehicles in the same queue are discharged. Consequently, queue discharge rates often kept rising even after the 15th vehicle has entered the intersection. If this queue discharge characteristic is common in the United States, then there is a need to assess the implications of con-tinued use of the traditional concept of saturation flow rate for capacity analysis of signalized intersections. To provide insight into this potential problem, this study examines the queue discharge characteristics at three intersections on Long Island, New York. The queue discharge characteristics at all three intersections were found to be similar to those observed in Taiwan and Hawaii.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Headway Compression during Queue Discharge at Signalized Intersections


    Additional title:

    Transportation Research Record


    Contributors:


    Publication date :

    2019-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Headway Compression During Queue Discharge at Signalized Intersections

    Lin, Feng-Bor / Thomas, Daniel | Transportation Research Record | 2005




    Entering Headway for Through Movements at Urban Signalized Intersections

    Al-Ghamdi, Ali S. | Transportation Research Record | 1999


    Entering Headway for Through Movements at Urban Signalized Intersections

    Al-Ghamdi, A. S. / National Research Council | British Library Conference Proceedings | 1999