- The city of Lorient (58 000 inhabitants) is the center city of the third agglomeration of Brittany. It has a long history of innovative actions to preserve the environment: work on water and energy savings since the 1980s, the French capital of biodiversity in 2013, labeled ADEME Cit'ergie in 2015. Concerning the sound environment in particular, work has been carried out for a long time (noise reduction at night, speed reduction in the City center). Today, the city is launching a master plan for active modes and is firmly committed to the implementation of tools enabling the smart city to emerge. The city thus makes available, within the framework of the ANR CENSE project, its urban furniture and its expertise in order to create a field of experimentation