THE ESTIMATION OF FREEWAY TRAVEL PATTERNS FROM RAMP COUNTS ON THE JOHANNESBURG RING ROAD USING AN ENTROPY MAXIMISING APPROACH

This paper describes the application of entropy maximising models to the synthesis of an origin-destination matrix for the Johannesburg ring road. The application utilises traffic counts on interchange ramps which were collected as part of a traffic monitoring programme being conducted by the University of the Witwatersrand on behalf of the Department of Transport. Some theoretical considerations are discussed, including the general estimation problem addressed by all models based on traffic counts, the classification of models based on traffic counts, and the theory of entropy maximising models applied generally and more specifically to linear systems. For the covering abstract of the conference see IRRD 288720. (TRRL)

• Supplemental Notes:
  • Annual Transportation Convention held at Milner Park Showgrounds, Johannesburg 25-29 July 1983, Volume 4.
• Corporate Authors:

  Council for Scientific & Industrial Res S Africa

  P.O. Box 395
  Pretoria,   South Africa 
• Authors:
  • Glass, P M
• Publication Date: 1983

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 449-465
• Serial:
  • Publication of: Council for Scientific & Industrial Res S Africa
  • Issue Number: S316
  • Publisher: Council for Scientific & Industrial Res S Africa

Subject/Index Terms

• TRT Terms: Conferences; Entropy (Communications); Estimating; Interchange ramps; Linear systems; Mathematical models; Maximization; Origin and destination; Traffic counts; Travel patterns
• Geographic Terms: South Africa
• Old TRIS Terms: Freeway ramps
• ITRD Terms: 435: Access road; 8525: Conference; 433: Interchange; 6484: Linear system; 6473: Mathematical model; 6494: Matrix; 2752: Motorway; 687: Origin destination traffic; 2729: Ring road; 8103: South Africa; 689: Traffic count; 313: Urban area
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00471155
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: May 31 1987 12:00AM