RRF Undergoes Underground Testing in Rennes Metro Network
The trials, carried out across the STAR metro network operated by KEOLIS Rennes, assessed the RRF's capacity to support voice communications, data transmission, video and geolocalisation in the confined conditions of tunnels and stations.
The Agence des Communications Mobiles Opérationnelles de Sécurité et de Secours (ACMOSS) conducted a new phase of operational testing for the Réseau Radio du Futur (RRF) within the Rennes metro network on 19 May 2026, marking a significant step forward in the deployment of France's next-generation critical communications infrastructure in challenging underground environments.
The trials, carried out across the STAR metro network operated by KEOLIS Rennes, assessed the RRF's capacity to support voice communications, data transmission, video and geolocalisation in the confined conditions of tunnels and stations. The exercise built upon earlier testing conducted on 29 April in partnership with SGAMI Ouest and KEOLIS Rennes, and involved a simulated crisis management scenario featuring a projected Operational Command Post established at KEOLIS premises, with technical teams deployed across the metro network.
The exercise engaged a broad range of institutional and operational partners, including the Prefecture of Ille-et-Vilaine, EMIZ Ouest, the National Police, the Gendarmerie Nationale, SDIS 35, and Rennes Ville et Metropole.
ACMOSS confirmed that the results will inform future RRF deployments in additional French metropolitan transport networks, with further rollouts anticipated in other cities by 2028 to 2029.
