ESTIMATING BASE MATRICES: THE COMBINED CALIBRATION METHOD

The Dutch National Model System (NMS) uses a pivot-point approach to forecast future characteristics as a result of changes in socio-economic data, changes in car ownership, accessibility and policy measures. In this pivot-point approach the model system predicts change relative to a base year situation. The predicted change factors, which are specific for O-D relations, mode, and purposes, are combined with base year matrices (by mode and purpose) to generate forecast year matrices (by mode, purpose and time-of-day). The current base matrix is out of date and needs to be re-estimated. The paper describes the theoretical issues of a Combined Calibration technique and its practical use in an integrated system taking account of congestion and time-of-day choice, giving an optimal consistency with the NMS. For the covering abstract, see IRRD 899083.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0860503046
• Corporate Authors:

  PTRC Education and Research Services Limited

  Glenthorne House, Hammersmith Grove
  London W6OL9,   England 
• Authors:
  • Gunn, H
  • MIJJER, P
  • LINDVELDT, K
  • HOFFMAN, F
• Conference:
  • TRANSPORTATION PLANNING METHODS VOLUME 1. PROCEEDINGS OF SEMINAR E HELD AT PTRC EUROPEAN TRANSPORT FORUM, BRUNEL UNIVERSITY, ENGLAND, 1-5 SEPTEMBER 1997. VOLUME P414
• Publication Date: 1997-9

Language

• English

Media Info

• Features: References;
• Pagination: p. 375-85

Subject/Index Terms

• TRT Terms: Accessibility; Calibration; Conferences; Economic factors; Economics; Forecasting; Mathematical models; Motor vehicles; Origin and destination; Ownership; Policy; Sociology; Transportation
• Geographic Terms: Netherlands
• ITRD Terms: 9139: Accessibility; 6171: Calibration; 8525: Conference; 263: Economics of transport; 132: Forecast; 6473: Mathematical model; 8078: Netherlands; 687: Origin destination traffic; 173: Policy; 2253: Sociology; 315: Vehicle ownership
• Subject Areas: Economics; Policy; Transportation (General);

Filing Info

• Accession Number: 00752552
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-86050-304-6
• Files: ITRD
• Created Date: Sep 18 1998 12:00AM