The purpose of this paper is to examine and report on the potentials of simplifying the activity of trip distribution modeling. The method suggested is elementary analysis, which is a systematic procedure for extracting column and row effects from a matrix of data, which yield a residual matrix. Requisite for the method is an O-D matrix, which is first transformed to logarithms before column and row averages are subtracted, resulting in a residuals matrix. The same operation is performed on a matrix of distances among the zones analyzed above, yielding a distance residuals matrix. These two residuals are graphed to determine the friction term of the gravity model. This friction factor, computed for a sample from a suburban circumferential corridor was applied to another sample from the same corridor. Using the gravity model, with the pull and push factors of the zones estimated with the friction factor, the origin-destination matrix is estimated. In this paper, this method is applied to sample work trip data in the Chicago area to demonstrate how the distance effect (friction factor) is extracted and the method is then applied to another data set as an empirical test. The method is considered to be a useful trip distribution modeling and forecasting technique whenever the study is relatively small and quick results are desired. /UMTA/

  • Corporate Authors:

    University of Illinois, Chicago

    Urban Transportation Center, 412 South Peoria Street, Suite 340
    Chicago, IL  United States  60607
  • Authors:
    • Soot, S
    • Sen, A K
  • Publication Date: 1978-3

Media Info

  • Pagination: 22 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00184576
  • Record Type: Publication
  • Source Agency: Urban Mass Transportation Administration
  • Report/Paper Numbers: UMTA-L-11-0008-78-4
  • Contract Numbers: UMTA-IL-11-0008
  • Files: TRIS, USDOT
  • Created Date: Feb 3 1979 12:00AM