The implementation of a Cerema-certified mobility survey (EMC2) 2024-2025 on border mobility basins with the Grand Duchy of Luxembourg and the Land of Saarland meets several objectives: - at regional and cross-border level, set up a database at the level of a territory with high mobility challenges to better analyse movements within and between living areas (a shortcoming today); - at local level, provide data or update outdated data for mobility actors and managers (some urban network forts, others having taken on mobility competence in 2021); - at regional level, to contribute to the territorial reflection of the mobility basins being set up; - better feed into the forward-looking computer model MMUST, which makes it possible to project transport demand and supply into the future in order to test the relevance of new measures and assess the evolution of polluting emissions; - have detailed mobility data at the level of the Greater Region on the same date (2024-2026); - have detailed mobility data at the scale of northern Lorraine and Alsace, on the same date (2023-2026); - have an energy-mobility emissions diagnostic (DEEM).