CAPACITY AT A SIGNAL-CONTROLLED JUNCTION WHERE THERE IS PRIORITY FOR BUSES

A discussion of the benefits of bus priority schemes shows the importance of providing adequate capacity for all streams of traffic. The analysis of capacity at a signal-controlled road junction is extended to cases where stages may be truncated or omitted in some cycles. The problem of finding signal settings which, when implemented with priority, emulate some which are known to provide a given level of capacity when implemented without priority is considered. Two commonly used rules to give priority by selective vehicle detection are analysed in detail and a third is considered briefly to illustrate the flexibility of the methods used. The range of conditions under which these priority methods can be implemented without causing any loss of capacity is quantified. If an additional rule is implemented to prevent priority from being granted too frequently, then this range covers most practical operating conditions. In cases outside this range, consequent losses of capacity can be estimated. A numerical example based upon a real bus priority experiment is provided. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01912615
• Corporate Authors:

  Pergamon Press, Incorporated

  Headington Hill Hall
  Oxford OX30BW,    
• Authors:
  • Heydecker, B G
• Publication Date: 1983-10

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 341-357
• Serial:
  • Transportation Research Part B: Methodological
  • Volume: 17B
  • Issue Number: 5
  • Publisher: Elsevier
  • ISSN: 0191-2615
  • Serial URL: http://www.sciencedirect.com/science/journal/01912615

Subject/Index Terms

• TRT Terms: Bus priority; Buses; Highway capacity; Intersections; Mathematical models; Traffic actuated controllers; Traffic signal cycle; Traffic signal preemption; Traffic signals
• Uncontrolled Terms: Capacity
• ITRD Terms: 1272: Bus; 643: Capacity (road, footway); 576: Cycle (traffic signals); 455: Junction; 6473: Mathematical model; 648: Priority (traffic); 565: Traffic signal; 557: Vehicle actuated
• Subject Areas: Highways; Operations and Traffic Management; Public Transportation; I71: Traffic Theory; I73: Traffic Control;

Filing Info

• Accession Number: 00382715
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Apr 30 1984 12:00AM