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One of the most promising approaches to understanding and managing urban travel is one which seeks to construct mathematical representations of the travel decisions made by individual urban-area residents. Current research in this approach has demonstrated clearly that both the improvement of model specification and the development of aggregation procedures can utilize methods of psychological scaling and market segmentation. The paper outlines the specific areas where psychological measurement techniques have primary potential for improving the ability of the transportation planner to understand and manage the urban transportation environment. Major applications are seen in describing the relative attractiveness of different activity sites to which an individual may travel and in describing the available (or future) modes of travel that may be used to reach the activity sites. In these two applications, methods of psychological scaling are seen as the primary applicable techniques. In the area of aggregation, market segmentation appears to have considerable potential as an aid to defining relatively homogeneous groups of the population, which may be treated as aggregates in the analysis of regional transportation policies.

Transport systems, the vital arteries of modern societies and economies, shape our world and are shaped by it. The subject of this volume is the dynamic interactions between transport and the physical, economic, and human geographies it weaves through. Transport plays a central role in economic development and growth. It profoundly affects the socio-economic characteristics and spatial form of urban centres and rural areas alike. A new transport link can bring increases in population, in employment, in industrial activity, in wealth. In turn, these changes can lead to demands for further transport improvements. All these factors are explored in the section on Transport and Spatial Form. Sections on Land-use/Transportation Modelling and Data then discuss how to obtain appropriate data and model these transport-geographic phenomena. The past decade has seen substantial research efforts devoted to improving transport modelling techniques, and the state of the art is described here. GIS and GPS are powerful technologies with a wide range of potential applications in this field, in which great advances have been made in recent years.Each therefore has a whole section devoted to it, both to established applications and to those yet to be fully exploited. While all these and the section on Network Analysis may be regarded as core areas, topics on the frontiers are also covered in this comprehensive volume, with sections on Spatial Cognition, GeoSimulation, and Time Use. Each chapter was specially commissioned from an acknowledged world expert on its topic. Each offers an overview and useful insights to those familiar with the area as well as those new to it. Systematic and thorough in its creation, current and accessible in its content, and authoritative and international in its authorship, the "Handbook of Transport Geography and Spatial Systems" will be the definitive reference work on this important subject.