APPLICATION OF AN ALGORITHM FOR ESTIMATING FREEWAY TRIP TABLES

The application of an existing computer program that uses only the marginal totals of a freeway trip table to estimate ramp-to-ramp traffic flows is described. The flows estimated by the program (synthetic origin destination matrices (SYNODM) were compared with origin-destination data obtained from a postcard survey and the distribution and magnitude of the estimation errors across the trip table were documented. A modified version of the basic SYNODM algorithm that incorporates limited origin-destination data into the estimation method is also discussed. Relative to the postcard data, the estimates of trip interchanges obtained from the modified version of SYNODM exhibited a substantially smaller average trip error than those obtained from the basic SYNODM program. However, given the limited scope of the study, no generalizations regarding the adequacy of the basic SYNODM program could be made.

Media Info

  • Media Type: Print
  • Features: Figures; Maps; References; Tables;
  • Pagination: pp 21-25
  • Monograph Title: TRAVEL MODEL DEVELOPMENT AND OPERATIONS RESEARCH METHODS
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00395398
  • Record Type: Publication
  • ISBN: 0309037581
  • Files: TRIS, TRB
  • Created Date: May 31 1985 12:00AM