This volume is the result of an international collaboration, which started with a conference at Smadalaro Gfrrd in Sweden. The workshop was supported by the National Science Foundation of the USA (INT-9215114) and by the Swedish National Road Administration, the Swedish Council for Building Research, the Swedish Transport and Communications Research Board and the Swedish Council for Planning and Coordination of Research. This support is gratefully acknow­ ledged. The collaboration started as a bilateral u.S.-Swedish endeavour but was soon widened to other scholars in Europe, Asia, Australia and South-America. Network Infrastructure and the Urban Environment is a policy area of growing importance. Sustainable cities and sustainable transport systems are necessary for attaining a sustainable development. The research and policy field, represented in this volume, comprises a number of challenging contrasts: - the contrast between infrastructure investments, mobility and environmental sustainability; - the contrast between policy contexts, modelling traditions and available decision support systems in various parts of the world; - the contrast between available best practice methods and the majority of models applied in planning; the contrast between static models of cross-sectionary equilibria and dynamic models of disequilibrium adjustments; and the contrast between state-of-the-art operationalland-use/transport models and new demands for land-use/transportlenvironment models due to changing policy contexts. Bridging some of these gaps constitutes important research tasks, that are discussed in the twenty-two chapters of this book. A number of emerging research directions are identified in the introduction and summary chapter.

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Preface 1. L. Lundqvist, L.G. Mattsson, T.J. Kim Network Infrastructure and the Urban Environment: Intro- duction and Summary PART I: ISSUES 2. B. Johansson Infrastructure and Economic Milieu: Swedish Contributions 1960-1995 3. T.R. Lakshmanan The Changing Context of Transportation Modeling: Implications of the New Economy, Intermodalism and the Drive for Environmental Quality 4. E.S. Mills Excess Commuting in U.S. Metropolitan Areas 5. P.Gordon, Y. Liao, H. Richardson Household Commuting: Implications of the Behavior of Two-Worker Households for Land-Use/Transporation Models PART II. DYNAMICS AND EQUILIBRIA IN NETWORK MODELLING. NEW THEORETICAL AND METHODOLOGICAL DEVELOPMENTS 6. T.L. Friesz, S.Shah, D.Bernstein Disequilibrium Network Design: A New Paradigm for Transportation Planning and Control 7. D.Bernstein, T.L. Friesz Infinite Dimensional Formulations of Some Dynamic Traffic Assignment Models 8. A. Nagurney, D. Zhang Introduction to Projected Dynamical Systems for Traffic Network Equilibrium Problems 9. B. Harsman, J.M. Quigley Worker and Workplace Heterogeneity and Residential Location: A Historial Perspective on Stockholm 10. D.E. Boyce, Y.-F. Zhang Parameter Estimation for Combined Travel Choice Models 11. S. Erlander, J.T. Lundgren Discrete Spatial Price Equilibrium 12. T.L. Friesz, Z.-G. Suo, L. Westin Integration of Freight Network and Computable General Equilibrium Models 13. T. Miyagi A Spatial Computable General Equilibrium Approach for Measuring Multiregional Impacts of Large Scale Transportation Projects PART III: INTEGRATED ANALYSIS OF ACTIVITY LOCATION AND TRANSPORTATION IN URBAN AND REGIONAL SYSTEMS 14. M. Wegener Applied Models of Urban Land Use, Transport and Environment: State of the Art and Future Developments 15. S.H. Putman Results from Implementation of Integrated Transportation and Land Use Models in Metropolitan Regions 16. T. de la Barra Improved Logit Formulations for Integrated Land Use, Transport and Environmental Models 17. C. Anderstig, L.-G. Mattsson Modelling Land-Use and Transport Interaction: Policy Analyses Using the IMREL Model 18. L. Lundqvist A Combined Model for Analysing Network Infrastructure and Land-Use/Transportation Interactions 19. J.R. Roy, L.O. Marquez, M.A.P. Taylor, T. Ueda Development of a Compact Urban Simulation Model 20. G.G. Roy, F. Snickars An Interactive Computer System for Land-Use Transport Analysis 21. P.F. Hanley, T.J. Kim A Combined Economic Activity and Transportation Model: A Solution Procedure and Application to Multi-Regional Planning 22. S.A. Rienstra, P. Rietveld, M.T. Hilferink,F.R.Bruinsma Road Infrastructure and Corridor Development