This book contains selected papers from the presentations given at the 7th EURO-Working Group Meeting on 'Iransportation, which took place at the Helsinki University of Technology (HUT), Finland, during August 2-4, 1999. Altogether 31 presentations were given and 14 full papers have been selected in this publication through a peer review process coordinated by the editors. The papers in this book cover a wide range of transportation problems from the simulation of railway traffic to optimum congestion tolling and mode choice modeling with stated preference data. In general, the variety of papers clearly demonstrates the wide areas of interest of people who are involved in the research of transportation systems and their operation. They as well demonstrate the importance and possibilities of modeling and theoretical approaches in the analysis of transportation systems and problem solving. Most of the papers are purely theoretical in nature, that is, they present a theoretical model with only a hypothetical example of applica­ tion. There are, however, some papers, which are closer to the practice or describe applications of and give interesting results of studies made by known methodologies. It is especially noteworthy, that half of the accepted papers deal with planning and operation of public transport.

Preface. Part I: Public Transport Models. 1. Managing and preventing delays in railway traffic by simulation and optimization; L. Suhl, et al. 2. Heuristics for scheduling buses and drivers for an ex-urban public transport computing with bus-driver dependencies; T. Mellouli, L. Suhl. 3. Computer aided planning of railroad operation; T. Siefer, D. Hauptmann. 4. Urban multimodal interchange design methodology; R. García, A. Marín. 5. Park-and-Ride station catchment areas in metropolitan Rapid Transit Systems; J.A. Mesa, F.A. Ortega. 6. Hub location problems in urban traffic networks; S. Nickel, et al. 7. Stochastic assignment to high frequency transit networks: models, algorithms and applications with different preceived cost distributions; G.E. Cantarella, A. Vitetta. Part II: General Transport Models. 8. When the MUSIC's over. Final results of MUSIC, an EU project to design and implement traffic signal timings which meet a variety of transport goals; R. Clegg, et al. 9. Algorithms for the solution of the combined traffic signal optimisation and equilibrium assignment problem; M. Maher, Xiaoyan Zhang. 10. Procedures for designing network controls; J. Clegg, Yanling Xiang. 11. Approach to congestion optimum toll in traffic networks; M.A. Gomez-Suarez, et al. 12. A dynamic network loading model for simulation of pollution phenomena; M. Dell'Orco. 13. Stated preference study of mode choice in the Helsinki metropolitan area; J. Kurri, et al. 14. Effects of data accuracy in aggregate travel demand modelscalibration with traffic counts; M. Ottomanelli.