TRAFFIC ASSIGNMENT AT DIFFERENT SPATIAL LEVELS: CONSEQUENCES FOR CORE STORAGE AND COMPUTER TIME

The final part of a feasibility study on the planning of large computer experiments dealing with the effects of the level of spatial detail in transportation analysis on the outcomes of this analysis is described. It is the aim of the feasibility study to examine the city size which can be coped with in these experiments in terms of core storage requirements, program dimensions, and computer time. The study is confined to the traffic assignment stage of the transportation analysis. Network model dimensions (numbers of centroids, nodes, and links) at nine different levels of spatial detail are estimated for six different city sizes different city sizes ranging from 100,000 to 300,000 population. Computer times for traffic assignments, specified by type of operation, and model type, are then calculated for each of the spatial levels and city sizes. The spatial model dimensions and computer times are estimated by using relationships developed in earlier parts of the feasibility study. /TRRL/

• Corporate Authors:

  Delft University of Technology

  Stevinweg 1
  Delft,   Netherlands  2600 GA
• Authors:
  • Bovy, P
  • Jansen, G
• Publication Date: 1974-5

Media Info

• Features: Figures; References; Tables;
• Pagination: 42 p.

Subject/Index Terms

• TRT Terms: Digital computers; Feasibility analysis; Information processing; Mathematical models; Network nodes; Networks; Population; Traffic assignment; Traffic distribution
• Uncontrolled Terms: Models
• Old TRIS Terms: Nodes
• ITRD Terms: 6464: Calculation; 8655: Data processing; 8673: Digital computer; 9014: Dimension; 132: Forecast; 9102: Method; 8078: Netherlands; 1054: Network (traffic); 143: Planning; 335: Population; 8645: Software; 5414: Time; 679: Traffic assignment; 313: Urban area
• Subject Areas: Highways; Operations and Traffic Management; Society;

Filing Info

• Accession Number: 00126110
• Record Type: Publication
• Source Agency: Institute for Road Safety Research, SWOV
• Report/Paper Numbers: R&D Rept.
• Files: ITRD, TRIS
• Created Date: Apr 21 1976 12:00AM