We evaluate whether trends in the prevalence of disability among the aged can be investigated using the 1980 U.S. Census' public transportation question and the 1990 query on mobility limitation. Despite the obvious difference in the two questions, we found remarkable similarity in major cross-sectional patterns, such as those by age and sex, when comparing results from the two data sets. This ...

In this paper we employ Mecklenburg County, North Carolina, a polycentric city with 10 employment subcenters, as a case study to explore the role of employment subcenters in determining residential location decisions. We estimate discrete choice models of residential location decisions: conditional logit models and heteroscedastic logit models with both the full choice set and sampled choices. ...

Urban street patterns form planar networks whose empirical properties cannot be accounted for by simple models such as regular grids or Voronoi tesselations. Striking statistical regularities across different cities have been recently empirically found, suggesting that a general and detail-independent mechanism may be in action. We propose a simple model based on a local optimization process co...

This paper presents a repository of trajectories’ models in a proposed moving object trajectories’ meta-model. It is highly abstracted and unified schema where current trajectories’ models are integrated; new patterns are added, such as measure and observation according to OGC sensor and measure meta-model. Furthermore, it integrates activity concept and generic device used as mobile object det...

Models depicting the spatial movement patterns of tourists within a destination are proposed in this paper. They are developed using an inductive approach based on urban transportation modeling and tourist behavior, to identify explanatory factors that could influence movements. Factors identified included a set of destination characteristics and a set of tourist characteristics that influence ...

Time geography had led geographers to analyse and model activity-travel patterns since the 1970s. The notion that activity-travel patterns are highly constrained has been frequently used in analytical studies and models of space-time behaviour. The popularity of this field of research lost most of its momentum in geography in the 1990s, but is now the dominant approach among civil engineers in ...

advantages and limitations compared with those of traditional shopping, the characteristics of e-shoppers, and the factors affecting the adoption and usage of e-shopping. Since the late 1990s, a growing number of empirical studies have addressed these questions. For example, Chang et al. (5) classified the determinants of e-shopping behavior into three categories: perceived characteristics of t...

In this paper some research questions which potentially lie within the purview of the new discipline of Computational Transportation Science are presented. Some of these questions are no doubt old and jaded and some may rightly reside in a different research field (or be seen as engineering) but viable solutions to all of the issues presented are of vital importance to the efficacy of future tr...

Networks are a fundamental model of complex systems throughout the sciences, and network datasets are typically analyzed through lower-order connectivity patterns described at the level of individual nodes and edges. However, higherorder connectivity patterns captured by small subgraphs, also called network motifs, describe the fundamental structures that control and mediate the behavior of man...