SATURN - A SIMULATION-ASSIGNMENT MODEL FOR THE EVALUATION OF TRAFFIC MANAGEMENT SCHEMES

The paper is in three parts. The first describes the model Saturn and its components. The second describes a closely-related technique for updating an origin-destination matrix using a limited set of traffic counts. The third part gives details of the application of both models for the north yorkshire town of harrogate. The saturn model, based on a fixed origin-destination matrix, incorporates two phases: a detailed simulation of delays at intersections and an assignment phase which determines the routes taken by origin-destination trips. The authors compare the performance of Saturn with three alternative models. Because the collection of data for matrices is expensive, a technique has been developed using the principles of entropy North Yorkshire town of Harrogate. The Saturn model, based a limited number of traffic counts. A method of seeding zero cells is used, producing a more stable and less distorted trip matrix, in the application of Saturn to Harrogate. The results show that the model gives a reasonably accurate and detailed picture of traffic flows, and matrix updating gives a good fit between observed and predicted flows. (TRRL)

  • Availability:
  • Corporate Authors:

    Printerhall Limited

    29 Newmart Street
    London W1P 3PE,   England 
  • Authors:
    • HALL, M
    • WILLUMSEN, L G
  • Publication Date: 1980

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00319547
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Feb 6 1981 12:00AM