By extending its tramway network, a metropolis aims to open up certain districts not currently served, and to limit the use of private vehicles in the city center. This project is accompanied by a program of urbanization, urban regeneration and encouragement of the use of active modes of transport along the corridor used by these extensions. Egis is leading the project management consortium and is responsible for the operational management of the project. In this context, Egis led the design of the future tramway maintenance and storage site, in compliance with BIM methodology, while making it compatible with the needs of digital twin operation.