Validation of TASHA: A 24-Hour Activity Scheduling Microsimulation Model

The objective of this paper is to verify/validate the results of an application of the Travel Activity Scheduler for Household Agents (TASHA) in the Greater Toronto Area (GTA), Canada. Validation of the activity generation and scheduling components of TASHA, discussed in this paper, are done using 1996 and 2001 travel survey data for the GTA. This validation proceeds in two parts: (a) verification of the ability of TASHA to replicate the 1996 base case upon which the model has been originally built; and (b) comparison of TASHA’s forecasts of 2001 daily travel behavior with observed travel survey data for 2001. TASHA activity generation and scheduling model components are found to replicate the observed activities with good accuracy and with a very good degree of precision for the base year. Although TASHA was not able to predict an observed increase in activity participation rate in a five year forecast, the distribution of activities in the day was successfully forecast. Predictions of average travel distance are oversimulated in the base year by only 0.7%, and observed increases in travel distance were predicted very well over the five year forecast period. Increased average distances were underpredicted for school, shopping, and other activities, and were slightly overpredicted for work and return home activities. These validation results are considered to be very good, although there exist opportunities to improve model performance, and to further validate other elements of the TASHA model.


  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; Tables;
  • Pagination: 18p
  • Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01047508
  • Record Type: Publication
  • Report/Paper Numbers: 07-2312
  • Files: TRIS, TRB
  • Created Date: Feb 8 2007 7:00PM