A DYNAMIC O-D MATRIX ESTIMATOR USING ANALYTIC DERIVATIVES

Static origin-destination matrix estimation can be formulated as a bilevel programming problem. The upper level problem tries to make the estimated matrix satisfy certain constraints, such as traffic counts, row and column totals, and similarity to an a priori matrix. The lower level problem typically stipulates an equilibrium assignment of the matrix to a network. This framework can be extended to the dynamic case. However, as is shown in the literature, computational issues such as convergence and efficiency of the solution algorithms become a serious issue. One of the central issues is the calculation of a convergent series of descent steps in the upper level of the problem. Recently a solution was presented based on the concept of subgradients which achieved improvements in convergence and in the speed of convergence. In this paper a method is proposed to alleviate the problem of finding convergent descent steps for the upper level problem. For the covering abstract see ITRD E124693.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0860503402
• Corporate Authors:

  PTRC EDUCATION AND RESEARCH SERVICES LTD

  1 VERNON MEWS, VERNON STREET
  LONDON,   United Kingdom  W14 0RL
• Authors:
  • LINDVELD, C
• Publication Date: 2002

Language

• English

Media Info

• Features: References;
• Pagination: 21 p.
• Monograph Title: AN ECONOMETRIC INVESTIGATION OF CAR USE IN THE NATIONAL TRANSPORT MODEL FOR GREAT BRITAIN
• Serial:
  • PROCEEDINGS OF THE AET EUROPEAN TRANSPORT CONFERENCE, HELD 9-11 SEPTEMBER, 2002, HOMERTON COLLEGE, CAMBRIDGE, UK - CD ROM
  • Publisher: PTRC EDUCATION AND RESEARCH SERVICES LTD
  • ISSN: 1474-9122

Subject/Index Terms

• TRT Terms: Conferences; Estimating; Estimation theory; Mathematical models; Origin and destination; Traffic counts
• ITRD Terms: 8525: Conference; 132: Forecast; 6473: Mathematical model; 687: Origin destination traffic; 689: Traffic count
• Subject Areas: Data and Information Technology; Design; Operations and Traffic Management;

Filing Info

• Accession Number: 00988366
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-86050-340-2
• Files: ITRD
• Created Date: Apr 4 2005 12:00AM