This multimodal version of the model system of the Transportation Resource Allocation Study employs aggregate modeling techniques that treat each urban area as a single analysis unit. A level of investment is specified, and within that level are mixes of 4 types of transportation facilities: freeways, arterials, conventional bus, and rapid transit. For each alternative, travel projections are made on the basis of both socioeconomic variables and the nature and extent of the transportation system. Travel is split between automobile and transit modes. System performance measures are estimated on the basis of the interaction of system supply and travel demand. Travel times and costs are calculated for each mode. In addition, the model calculates external effects such as land consumed, air pollution, and fatalities. The model tested the effects of 12 alternatives consisting of 4 mixes of transportation facilities for the 63 urbanized areas that will have populations of more than 500,000 in 1990.

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 31-41
  • Monograph Title: Transportation planning: improvement priorities
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00050660
  • Record Type: Publication
  • ISBN: 030902191X
  • Files: TRIS, TRB
  • Created Date: Feb 15 1981 12:00AM