ACCESS CONTROL ON NETWORKS WITH UNIQUE ORIGIN--DESTINATION PATHS

This paper presents improved time-dependent control strategies for small freeway networks with bottlenecks and unique origin-destination (O-D) paths. It is assumed that there are no spillovers from any of the freeway exits so that freeway queues and delays can be completely avoided by regulating access to the system so as to maintain bottleneck flows strictly below capacity. It is also assumed that the time-dependent O-D table and the time-dependent bottleneck capacities are known, although not always a priori. The proposed control strategies attempt to minimize the total delay while avoiding queues inside the system. The problem is formulated as a constrained calculus of variations exercise that can be cast in the conventional form of optimal control theory and can also be discretized as a mathematical program. Although the first-in first-out (FIFO) requirement for the access queues introduces undesirable non-linearities, exact solutions for 4 important special cases can be obtained easily. A greedy heuristic algorithm is proposed for the general case. The algorithm is non-anticipative in that it regulates access at the current time without using future information. As a result, it is computationally efficient and can be bolstered with dynamically-updated information.

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

  Elsevier

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  Kidlington, Oxford  United Kingdom  OX5 1GB
• Authors:
  • Lovell, D J
  • Daganzo, C F
• Publication Date: 2000-4

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 185-202
• Serial:
  • Transportation Research Part B: Methodological
  • Volume: 34
  • Issue Number: 3
  • Publisher: Elsevier
  • ISSN: 0191-2615
  • Serial URL: http://www.sciencedirect.com/science/journal/01912615

Subject/Index Terms

• TRT Terms: Access control (Transportation); Algorithms; Bottlenecks; Freeway management systems; Mathematical models; Origin and destination; Time dependence; Traffic control; Traffic delays; Traffic models; Traffic queuing
• Uncontrolled Terms: Freeway networks
• Subject Areas: Highways; Operations and Traffic Management; Planning and Forecasting; I72: Traffic and Transport Planning; I73: Traffic Control;

Filing Info

• Accession Number: 00789511
• Record Type: Publication
• Files: TRIS, ATRI
• Created Date: Mar 25 2000 12:00AM