Macrosimulation of Operations at Public Transport Corridors

This paper presents a macroscopic simulation model that represents the operation of a public transport corridor with enough detail to take into account all sources of delays, mainly running time, signal and stops delays. We used up-to-date traffic theory to describe these sources of delay and ad-hoc models to decide the optimum stop spacing. Vehicles can be trams, guided, articulated or conventional buses running on a segregated way, such as a bus lane or busway. Outputs of the model are commercial (mean) speed of public transport vehicles as well as their delays at each road element. The model has been validated against real data in a busway in Santiago de Chile showing an average discrepancy of less that 1% in the commercial speed. The impact of various traffic measures has been tested with the model, such as the optimum stop spacing, number of berth and overcoming facilities at stops, and signal timings that considers the progression of public transport vehicles. As a result, the authors have found that commercial speed can be improved between 9 to 20% if stop are optimally spaced. A further 2 to 7% can be achieved if overtaking facilities are provided at stops. If traffic signals are set so that they take into account the bus progression, an additional 3 to 5% increase in commercial speed is attained. In summary the model is more accurate that simplified analytical models, but less complicated that microscopic simulation to assess traffic measures to improve public transport operations.

Language

  • English

Media Info

  • Media Type: DVD
  • Features: Figures; Maps; References; Tables;
  • Pagination: 16p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01154840
  • Record Type: Publication
  • Report/Paper Numbers: 10-0218
  • Files: TRIS, TRB
  • Created Date: Jan 25 2010 10:10AM