The overall objective of project P22 is the analysis of the robustness and theimprovement of timetables and regulation techniques in urban railway systems.The project is expected to produce tools and models to evaluate and comparetimetables and regulation techniques that will serve as decision support duringearly phases of urban train systems conception.The project is divided into two phases : Phase 1 (ending in December 2014)will consist in a state of the art on regulation of urban rail systems, a preliminaryexploration of adapted formalisms to model urban train systems, timetablesand regulation algorithms, and a denition of objectives for the second phase.Phase 2 is expected to last up to 3 years, and will consist in a development ofthe techniques and directions dened during Phase 1.This document summarizes the expected contributions of the rst phase ofproject P22, and the use cases that will be used to validate the proposed ap-proaches: an existing metro network topology, typical examples of perturbationscenarios, and of regulation policies.