The purpose of this study was to develop a simulation model that represents urban bus operation on signalized arterial streets. The model is to be used as an evaluation tool in the formulation of new schemes to improve bus service in urban areas. To pave the way for the development of such a model, two basic relationships in urban bus systems were investigated. They respectively involve: (1) the time required to load and unload a certain number of passengers and (2) the bus speed and acceleration characteristics. The model developed was named "SUB" (Simulation of Urban Buses) and its program written in FORTRAN language. Traffic is simulated on the model by groups of vehicles that are processed at constant time intervals. Buses, on the other hand, are represented individually and processed only when significant events occur. The model has been calibrated in Washington, D.C. verified and subjected to sensitivity tests. It has been validated by comparing its results with real-life data and its usefulness has been demonstrated by applying the model to predict the effect of an exclusive bus lane.

  • Corporate Authors:

    Federal Highway Administration

    Traffic Systems Division, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Radelat, G
  • Publication Date: 1973-12

Media Info

  • Pagination: 251 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00264622
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-74- 6 Final Rpt., FCP 22B3-022
  • Files: TRIS, USDOT
  • Created Date: Jan 16 1981 12:00AM