part 1 Fundamental Issues in Transportation Systems -- chapter 1 1 Principal Characteristics of Intelligent Transportation Systems -- part 1 2 Scientific Validation of ITS Designs through Modeling and Simulation -- chapter 2 DARYN: A Distributed Decision-Making Algorithm for Railway Networks -- chapter 3 RYNSORD: A Novel, Decentralized Algorithm for Railway Networks with Soft Reservation -- chapter 4 DICAF: A Distributed, Scalable Architecture for IVHS -- chapter 5 Stability of RYNSORD Under Perturbations -- chapter 6 Modeling and Simulation Techniques for ITS Designs -- part 7 Future Issues in Intelligent Transportation Systems -- chapter 8 Description of the RYNSORD Simulator on CD-ROM and Scope of Experiments.