EQUILIBRIUM ASSIGNMENT OF TRAFFIC TO ROAD NETWORKS CONTAINING SIGNALS - THE NEED FOR MULTI-VALUED LINK TRAVEL-TIMES

It is argued that the use of average link travel-times common to all users of individual links of a road network containing signals can lead to the calculation of assignments which are inconsistent with the underlying assumptions concerning route choice. By means of a simple example involving two signalised junctions, it is shown that the resulting discrepancies in the assignment can be by no means insignificant. The implications for assignment models are discussed.(a) (TRRL) although this interval corresponds to stress variations of about plus or minus 30% of the average stress. Previously reported experimental results for bohus granite, ekeberg marble and lemunda sandstone showed no statistically significant decrease of the uniaxial tensile strength with increasing sample volume. The same result is obtained for these rocks in the uniaxial compressive strength test in which rock cores, the length of which was twice the diameter, were tested. These statistically very well established results are in contradiction to the currently accepted knowledge within the field regarding the effects of sample size on strength values for rock materials.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00410683
• Corporate Authors:

  Printerhall Limited

  29 Newmart Street
  London W1P 3PE,   England 
• Authors:
  • CHARLESWORTH, J A
• Publication Date: 1980-3

Media Info

• Features: Figures; References;
• Pagination: p. 108-113
• Serial:
  • Traffic Engineering & Control
  • Volume: 21
  • Issue Number: 3
  • Publisher: Hemming Group, Limited
  • ISSN: 0041-0683
  • Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

• TRT Terms: Axial loads; Eccentricity; Equilibrium (Mechanics); Intersections; Itinerary; Mathematical models; Networks; Roads; Route choice; Samples; Size; Tests; Traffic assignment; Traffic delays; Traffic signal control systems; Traffic signals; Travel time; Trip length
• Uncontrolled Terms: Axial; Road networks; Selection
• ITRD Terms: 9010: Delay; 699: Itinerary; 697: Journey time; 455: Junction; 6473: Mathematical model; 1053: Road network; 9072: Selection; 565: Traffic signal
• Subject Areas: Highways; Operations and Traffic Management; I71: Traffic Theory; I73: Traffic Control;

Filing Info

• Accession Number: 00319249
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Feb 6 1981 12:00AM