TRAVEL TIME AS TRAFFIC ASSIGNMENT INPUT: SOME DIFFICULTIES EXPLORED

REISTIJDEN ALS ASSIGNMENTINVOER; EEN DISCUSSIE OVER ENKELE PROBLEMEN

The main theme of this paper is the hypothesis that it is, in the current situation, probably more fruitful to concentrate efforts on improving assignment input quality, rather than only on developing more and more sophisticated assignment models, in order to increase the precision of assignment results. In particular, emphasis should be placed on travel times or travel time functions. After pointing out in a general fashion the relationship between specification errors and data errors, the ways in which inaccuracies of the travel times affect the outcomes of the travel prediction are indicated. A discussion of potential explanatory factors of travel time is followed by A recommendation to establish a travel time model. Special attention is paid to the amount of travel time intersections account for. Then some drawbacks of current assignment models are discussed. Finally, some problems are outlined concerning travel times, which are related to our experiments on the effect of zone size and network detail on assignment results. /Author/TRRL/

• Corporate Authors:

  Colloguium Vervoersplanologisch Speurwerk

  P.O. Box 45
  Delft,   Netherlands 
• Authors:
  • Jansen, GRM
• Publication Date: 1976

Language

• Dutch

Media Info

• Features: Figures; References;
• Pagination: p. 569-598
• Serial:
  • Publication of: Colloguium Verkeersplanologisch Speurwerk
  • Publisher: Colloguium Vervoersplanologisch Speurwerk

Subject/Index Terms

• TRT Terms: Conferences; Errors; Forecasting; Information processing; Intersections; Mathematical models; Matrices (Mathematics); Networks; Parking; Pedestrians; Public transit; Roads; Speed; Stiffness; Traffic assignment; Traffic signals; Travel; Travel time; Trip length
• Uncontrolled Terms: Models; Road networks
• Subject Areas: Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Planning and Forecasting; Public Transportation; I71: Traffic Theory; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00142733
• Record Type: Publication
• Source Agency: Institute for Road Safety Research, SWOV
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Aug 4 1981 12:00AM