TECHNIQUE FOR DETERMINING TRAVEL CHOICES FOR A MODEL OF NONWORK TRAVEL

In transportation corridor studies, it is not always clear whether the effects of non-mode-choice decisions for discretionary travel demand should be considered in detailed analyses. This paper presents a manual approach that can be used by planners to determine quickly whether time-of-day, trip frequency, or destination choice effects can be neglected early in the planning process. The approach relies on demand elasticities obtained from disaggregate travel demand models. Demand models that capture the causal structure of shopping trip decisions were first introduced in 1972 in a study performed by Charles River Associates for the Federal Highway Administration. To simplify the modeling approach, the study developed the concept of inclusive price. This paper presents a revised specification of the inclusive price variables and identifies the resulting new elasticity equations for separable discretionary travel demand models. The differences between the previous and revised definitions of elasticity with respect to travelers' responses to changes in transportation level of service are highlighted. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 47-53
  • Monograph Title: Transportation forecasting and travel behavior
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00195990
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 15 1981 12:00AM