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 The current base matrix is out of date and needs to be re-estimated.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.
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Availability:
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Corporate Authors:
PTRC Education and Research Services Limited
Glenthorne House, Hammersmith Grove
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Authors:
- Gunn, H
- MIJJER, P
- LINDVELDT, K
- HOFFMAN, F
- Conference:
- 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