SMART: simulation model for activities, resources and travel

Abstract

This paper proposes the development of an activity-based model of travel that integrates household activities, land use patterns, traffic flows, and regional demographics. The model is intended as a replacement of the traditional Urban Transportation Planning System (UTPS) modeling system now in common use. Operating in a geographic-information system (GIS) environment, the model's heart is a Household Activity Simulator that determines the locations and travel patterns of household members daily activities in 3 categories: mandatory, flexible, and optional. The system produces traffic volumes on streets and land use intensity patterns, as well as typical travel outputs. The model is particularly well suited to analyzing issues related to the Clean Air Act and the Intermodal Surface Transportation Efficiency Act (ISTEA). Implementation would, ideally, require an activity-based travel diary, but can be done with standard house-interview travel surveys. An implementation effort consisting of validation research in parallel with concurrent model programming is recommended.

Multiple purposes at single destination: A key to a better understanding of the relationship between tour complexity and mode choice

“…This section defines the concepts used in this paper. Activities are classified into three broad groups based on Stopher et al (1996) and Bhat and Misra (1999) as follows:…”

Defining and understanding trip chaining behaviour

“…Each activity type is allocated a priority and category level, with more than one type permitted per level. The order of priority is determined from the hierarchy of activity types as defined by Stopher et al (1996), i.e., mandatory, flexible or optional activities. Activities within each chain are then ranked in order of importance, determined firstly in order of category level, then on the basis of longest duration for activities with the same category.…”

“…Thus the activities drive the trip making process. Stopher et al (1996) classified activities into three categories:…”

GABRIEL: Gis Activity-Based tRavel sImuLator. Activity Scheduling in the Presence of Real-Time Information

“…The list includes STARCHILD [48], SCHEDULER [21], the model proposed by Smith et al [50] and Clark and Smith [15], and the model developed by Payne et al [46]. Recently developed CPMs include: AMOS [33], PCATS [32], GISICAS [37], SMASH [17], and SMART [51].…”