CAPACITY AND SPEED-FLOW RELATIONSHIPS ON RURAL TWO-LANE HIGHWAYS IN GERMANY

The standard speed-flow relations for two-lane rural highways which are included in the current German guidelines needed significant improvements. Therefore, new calibrations have been performed. They are based on travel time measurements, on local measurements and on simulation studies. The curvature of the road, the gradient and the percentage of trucks are used as parameters. Some rather unexpected results occurred. This was, at first, the concave shape of the speed-flow curves. Moreover the influence of trucks turned out to be rather complex, such that passenger car units could not be identified. Finally, the capacities for mountain roads proved to be far less than expected. The new speed-flow curves will be implemented into the future German Highway Capacity Manual HBS. Here, however, some questions regarding the useful measure of effectiveness have still to be solved.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/8774919059
• Corporate Authors:

  Danish Road Directorate

  13 Niels Juels Gade, P.O. Box 9018
  Copenhagen K,   Denmark  DK-1022
• Authors:
  • Brilon, W
  • Weiser, F
• Conference:
  • Third International Symposium on Highway Capacity
  • Location: Copenhagen, Denmark
  • Date: 1998-6-22 to 1998-6-26
• Publication Date: 1998-6

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 199-218

Subject/Index Terms

• TRT Terms: Highway capacity; Highway curves; Highway grades; Measures of effectiveness; Mountain roads; Passenger car equivalence; Percent; Rural highways; Simulation; Traffic flow; Traffic speed; Travel time; Trucks; Two lane highways
• Identifier Terms: Highway Capacity Manual
• Geographic Terms: Germany
• Subject Areas: Highways; Motor Carriers; Operations and Traffic Management; Planning and Forecasting; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00782315
• Record Type: Publication
• ISBN: 8774919059
• Report/Paper Numbers: Volume 1
• Files: TRIS
• Created Date: Jan 31 2000 12:00AM