ALTERATIONS TO THE TRANSYT-7F MODEL TO REPRESENT NEAR-SIDE TRANSIT STOPS

Transit vehicles stopping to load/unload passengers on-line at a signalized intersection can obstruct the flow of other vehicles. The TRANSYT model ignores the delay to other traffic caused by this loading/unloading process. This can cause TRANSYT to use incorrect flow profiles, resulting in signal timings that cater to these profiles rather than the actual ones. This paper describes a new model for representing near-side transit stops in lanes shared by public transit and private vehicles, and its implementation into the TRANSYT-7F program. The results of an initial application of the proposed model are also described. The proposed model, which is a deterministic simulation model, is able to represent the effect of near-side transit stops on the other traffic; this representation covers both total and partial blockage of the approaches during the transit loading. The procedure has been incorporated into the TRANSYT-7F program. This allows appropriate representation of the adverse effects of transit loading on-line during a green phase. It thus encourages the TRANSYT optimizer to push transit loading to the red phases.

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  • Corporate Authors:

    Institute for Transportation, Incorporated

    1410 Duke University Road
    Durham, NC  United States  27705
  • Authors:
    • Jacques, MAP
    • Yagar, S
  • Publication Date: 1994-12

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00667310
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 10 1994 12:00AM