The eCoMove project, which is funded by the European Commission under the 7th Framework Programme Research and Technological Development, creates a system to reduce the CO2 emissions and fuel consumption of vehicles. The system uses the cooperative technology of V2I-Communication (vehicle to infrastructure communication). Within the different subprojects, in-vehicle and infrastructure site applications are developed. As only a limited number of vehicles are equipped with the sys-tem, network wide effects of the systems cannot be measured within the real test sides. A validation of these effects can be done using microscopic traffic flow simula-tion. This article introduces the concept of the simulation environment used for the validation within the ecoMove project.