MODIFYING TRANSIT MODE SHARE IN HOUSEHOLD SURVEY EXPANSION

A procedure to modify the proportion of expanded trips by different travel modes from the 1991 Boston Regional Household-Based Travel Survey is presented; it is based on two data sources: the Census journey-to-work data and local transit ridership estimates. The procedure is a two-step adjustment applied to the existing survey trip expansion factors, which yielded a much higher volume of transit trips than the regional ridership estimates. The first adjustment step adjusts the expansion factors of commuters (persons who reported work trips in Survey) by matching the distribution of commuters in the Survey to the Census journey-to-work data by travel modes and residence-workplace locations. The second adjustment step is an iterative process that revises the expansion factors of other individuals (noncommuters) in the Survey by matching the expanded transit trips to the regional transit ridership estimates by transit submodes. It is assumed that the adopted procedure improves the randomness of the survey sample for modeling purposes. The adjusted trip expansion factors produced from the procedure are used to weigh the survey sample for mode choice model estimation, trip distribution model calibration, or other model evaluation purposes.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 25-34
  • Monograph Title: Public transportation 1995: current research in planning, management, technology, and ridesharing
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00714917
  • Record Type: Publication
  • ISBN: 0309061741
  • Files: TRIS, TRB
  • Created Date: Dec 15 1995 12:00AM