The displaced left-turn (DLT) design, also known as the continuous flow intersection, has proved to be a superior alternative to the conventional intersection in terms of handling heavy volumes during peak periods. In locations where the availability of additional right-of-way and driveway access is not a major concern, the DLT design is a cost-effective and time-saving option compared with the expensive option of grade-separated interchanges. Recently, a new nontraditional intersection design called the parallel flow intersection (PFI) has been proposed. The PFI is also an at-grade design and operates with the same number of signal phases as a DLT. This research compares the operational performance of DLT and PFI designs based on the maximum through and left-turn movement throughputs for three different high-volume scenarios using traffic simulation. The results indicate that maximum throughput values of through movement in the PFI were very close to the values obtained for the DLT. The designs produced similar results, mainly because both operate as two-phase signals (at the main intersection) with equal green times for through movements. The left-turn movement throughputs in the PFI were found to be lower than those in the DLT. For two study cases, the DLT was able to process 180 and 80 more vehicles per hour per lane than the PFI. This is attributable to left-turning vehicles experiencing a greater number of stops, on average, in a PFI than they would in a DLT.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Performance Analysis of Parallel Flow Intersection and Displaced Left-Turn Intersection Designs


    Additional title:

    Transportation Research Record


    Contributors:


    Publication date :

    2010-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    The Applicability of Displaced Left-Turn Intersection

    Pan, Binghong / Ying, Jinfeng | ASCE | 2020


    Signal design for displaced left-turn intersection using Monte Carlo method

    Suh, Wonho / Hunter, Michael P. | Online Contents | 2014


    Displaced Left-Turn Intersection: A Two-Stage Model and Application Insight

    Chu, Yuan / Li, Jing / Luo, Sida et al. | ASCE | 2019


    Signal design for displaced left-turn intersection using Monte Carlo method

    Suh, Wonho / Hunter, Michael P. | Springer Verlag | 2014