INITIAL ATTEMPTS AT MODELLING FREIGHT FLOWS

This paper sets out a framework for the analysis of the generation and distribution aspects of road freight flows and tests the validity of the results. The main data sources are the 1962 road goods survey in the form of tcm tonnage and trip matrices, and employment by standard industrial order from the 1966 population census. Freight generation and attraction are examined using regression analysis based on zonal industrial employment, and distribution examined using both a doubly constrained gravity (interactance) model and a linear programming minimum cost model. The results indicate that existing freight modelling techniques do not produce accurate estimates of either generation or distribution, suggesting either that existing models require considerable refinement, involving more detailed data than is currently available or could reasonably be forecast, or that a completely new approach needs to be adopted. (A) /TRRL/

• Corporate Authors:

  Department of the Environment, England

  Mathematical Advisory Unit
  London SW1P 3EB,   England 
• Authors:
  • Heyman, R
• Publication Date: 1971-3

Language

• English

Media Info

• Features: Figures; Tables;
• Pagination: 69 p.

Subject/Index Terms

• TRT Terms: Census; Commodity flow; Costs; Economics; Freight handling; Freight transportation; Gravity models; Mathematical models; Origin and destination; Physical distribution; Regression analysis; Traffic flow; Transportation; Trip generation; Urban areas
• ITRD Terms: 224: Cost; 9016: Distribution (gen); 1112: Freight transport; 663: Generated traffic; 690: Gravity model; 696: Journey purpose; 6473: Mathematical model; 687: Origin destination traffic; 6588: Regression analysis; 671: Traffic flow; 313: Urban area
• Subject Areas: Data and Information Technology; Economics; Planning and Forecasting; Society; Transportation (General); I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00128165
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Note 211 R&D Rept.
• Files: ITRD, TRIS
• Created Date: Apr 21 1976 12:00AM