MEASUREMENT-BASED TRAFFIC FLOW SIMULATION FOR THE DETERMINATION OF SECTION-RELATED TRAFFIC DATA

Dynamic traffic flow development on a road section without off- and on-ramps is determined by time-related boundary conditions at the beginning and the end of the road section and the section-related starting profile of the density and the speed distribution. In cases of application, usually, these initial distributions are not known. In addition, the measured data will sometimes be subject to errors. For this reason, a method to calculate section-related data should be fault-tolerant both to inaccurate starting distributions and inaccurate measurement data. The authors develop a macroscopic traffic flow model simulating off- and on-ramps by using sources and sinks. Starting with initial conditions obtained by interpolating the measured traffic data, using finite difference methods and a tailored least-square method, the model is able to calculate the density and velocity profile as function of time and space. After a transient phase, the simulated traffic flow quantities agree well with experimental data. This is only possible, though, with a sufficiently small distance between the measurement points. The implementation of off- and on-ramps by using various distributions of sources and sinks reveals that the distribution has only a minor effect on the measurement-based traffic flow simulation. The represented method is implemented in the Melyssa field test.

• Supplemental Notes:
  • Five volumes of papers and one volume of abstracts comprise the published set of conference materials.
• Corporate Authors:

  VERTIS

  TORANOMOM 34 MORI BUILDING 1-25-5
  TORANOMON, MINATOKU, TOKYO 105  Japan 
• Authors:
  • KRONJAGER, W
  • KONHAUSER, P
  • Rodiger, M
• Conference:
  • Steps Forward. Intelligent Transport Systems World Congress
  • Location: Yokohama, Japan
  • Date: 1995-11-9 to 1995-11-11
• Publication Date: 1995-11

Language

• English

Media Info

• Pagination: p. 84

Subject/Index Terms

• TRT Terms: Boundary value problems; Density; Measurement; Methodology; Speed distribution; Time; Traffic data; Traffic flow; Traffic simulation; Velocity
• Uncontrolled Terms: Boundary conditions
• Subject Areas: Highways; Operations and Traffic Management; I71: Traffic Theory;

Filing Info

• Accession Number: 00716545
• Record Type: Publication
• Report/Paper Numbers: Volume 1
• Files: TRIS
• Created Date: Feb 28 1996 12:00AM