AN ANALYSIS OF THE SIZE OF NETWORK MODELS

The aim of this study is to develop relations between the size of the actual road network in a city and the size of the corresponding network model, of the kind required for transport network analysis. Network models of the lowest level of detail possible are considered. These relations provide the information necessary for an investigation into the effects of variations in the level of spatial detail in transportation planning. In two different city districts a complete count of intersections, street sections and regions (building blocks) of the actual road network has been carried out. The same has been done for the corresponding network models in both areas. Relations are established between a) numbers of nodes (model) and intersections (actual) b) numbers of links and street sections C) numbers of centroids and regions. Considerable differences exist between the two districts. They can be explained by the network structure expressed in the so called beta index. On this basis predictive models for total cities have been developed for the numbers of network model elements. /TRRL/

• Corporate Authors:

  Delft University of Technology

  Stevinweg 1
  Delft,   Netherlands  2600 GA
• Authors:
  • Jansen, GRM
  • Bovy, P H L
• Publication Date: 1974-3

Media Info

• Features: Figures; References; Tables;
• Pagination: 57 p.

Subject/Index Terms

• TRT Terms: Analysis; Central business districts; Forecasting; Intersections; Mathematical models; Networks; Planning; Roads; Size; Transportation; Transportation planning; Urban areas; Urban transportation
• Uncontrolled Terms: Models; Road networks; Transportation models
• ITRD Terms: 9014: Dimension; 132: Forecast; 455: Junction; 6205: Model (not math); 1054: Network (traffic); 143: Planning; 311: Town centre
• Subject Areas: Operations and Traffic Management; Planning and Forecasting; Transportation (General); I71: Traffic Theory; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00097021
• Record Type: Publication
• Source Agency: Institute for Road Safety Research, SWOV
• Report/Paper Numbers: R&D Rpt.
• Files: ITRD, TRIS
• Created Date: Nov 5 1975 12:00AM