DISTRIBUTION OF REGIONAL VEHICLE MILES OF TRAVEL TO LARGE ZONES FOR SKETCH PLANNING

The basic feature of a sketch planning model is the relatively fast processing of a minimal amount of data to provide better than order of magnitude information about a proposed transportation plan. The goal is not a finely detailed analysis of an alternative, but rather an idea of its relative worth as compared to other alternatives on the basis of a range of impacts. Effects are desired, not only at the regional level, but also subregionally, with the level of disaggregation being such that it provides a general, but useful, degree of localization. An approach is developed for distributing travel about a region subdivided into zones with an average size of about 10-15 square miles and ranging in size from 6 to 30 square miles. Distance is used as the travel impedance parameter and time ratio is the determining factor for diversion to freeways. An exponential distance distribution formulation is used which has been empirically shown to hold in several regions and which enables the development of an approach requiring almost no calibration. Test results of the approach in two metropolitan areas of distinctly different character indicate that the analysis does represent a reasonable solution to the problem of distributing travel, by facility type, in a region composed of rather large zones. /TRRL/

  • Corporate Authors:

    Pergamon Press, Incorporated

    Maxwell House, Fairview Park
    Elmsford, NY  United States  10523
  • Authors:
    • SCHLEIFER, H
    • Zimmerman, S L
  • Publication Date: 1977-2

Media Info

  • Features: Figures; References;
  • Pagination: p. 45-52
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00164382
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Analytic
  • Files: ITRD, TRIS
  • Created Date: Feb 16 1978 12:00AM