The objective of the report is to produce qualitative analysis of the evolution of the transport system after important infrastructure investment project, and also to produce quantitative indicators. This report corresponds to the work package 4 of the TranSEcon project whom aims is to assess long term effect of large transport investment.Content of the report : [chapter 2]: presentation of the general methodology for impact assessment within TranSEcon project.[chapter 3]: presentation of the general framework of work package 4. In this chapter the application of the general methodology developed for work package 4 is described. The grid of indicators is first described and then data production and collection is commented[chapter 4]: presentation of the case studies[chapter 5]: description and impact on public transport and private transport supply system. Here some indicators are described to quantify both public and private transport supply. The impact on investment, operating costs and transport related revenues is then analysised[chapter 6]: analysis of the impact on demand of the case studies project in terms of mobility, passenger*kilometre and time savings[chapter 7]: is dedicated to results concerning transport environment and safety impact analysis. (Extract of the report).