THE SWEDISH NATIONAL MODEL SYSTEM FOR GOODS TRANSPORT - SAMGODS: A BRIEF INTRODUCTORY OVERVIEW

This purpose of this report is to provide a brief but reasonably comprehensive overview of the Swedish national goods model system SAMGODS. The problem of modelling the entire goods transport system of a whole nation is very complex. It is necessary to balance many needs against each other, and many compromises and simplifications will be inevitable. One has to recognise also, that alterations and amendments of the model will be necessary over time due to changes of the driving forces of demand as well as changing requirements on the model output due to shift of focus of the policy making processes. The Swedish national model system for goods transport could most correctly be described as a set of separate models, sometimes developed for entirely different purposes than the analysis of national goods transport demand, which have been tied together to enable them to interact in a reasonably effective and consistent way in the process of modelling Swedish goods transport demand. The system comprises two major subsystems namely the transport demand models, and the transport network/transport market model. A third model package, the evaluation models and tools, are associated with these models. The demand models generate spatially disaggregated demand matrixes which are also disaggregated into separate commodities. The spatial structure covers not only Swedish territory but also the European union as well as all other areas involved in Swedish foreign trade. The demand matrices are used as input to the transport network/market model, which allocates the flow matrices to the transport modes and networks according to a system cost minimising algorithm. The model system allows projections to be made of transport flows on transport modes and networks, analyses of transport chains, modelling of transport system effects of certain transport policy measures as well as the effects of changes to the infrastructures. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/14013460
• Corporate Authors:

  STATENS INSTITUT FOER KOMMUNIKATIONSANALYS

  BOX 17213
  STOCKHOLM,   Sweden  SE-104 62
• Authors:
  • SWAHN, H
• Publication Date: 2001

Language

• English

Media Info

• Features: References;
• Pagination: 50 p.
• Serial:
  • SAMPLAN RAPPORT
  • Issue Number: 2001:1
  • Publisher: STATENS INSTITUT FOER KOMMUNIKATIONSANALYS
  • ISSN: 1401-3460

Subject/Index Terms

• TRT Terms: Administration; Calibration; Demand; Evaluation and assessment; Freight transportation; Methodology; Networks; Scale models; Structural models; Types of roads by network
• Uncontrolled Terms: Traffic networks; Use
• Geographic Terms: Sweden
• ITRD Terms: 155: Administration; 6171: Calibration; 285: Demand (econ); 9020: Evaluation (assessment); 1112: Freight transport; 9102: Method; 6205: Model (not math); 1054: Network (traffic); 8109: Sweden; 9084: Use
• Subject Areas: Administration and Management; Bridges and other structures; Freight Transportation;

Filing Info

• Accession Number: 00822166
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Files: ITRD
• Created Date: Jan 7 2002 12:00AM