On 14 July 1984, after pressure from several municipalities and inhabitants of the Manche département, the association increased its interest to the preservation of all local railways in the Manche and became Association pour les Transports en Commun de la Manche (ATCM).
On 14 July 1984, after pressure from several municipalities and inhabitants of the Manche department, the association intensified its efforts to preserve all local railways in the Manche and became known as the Association pour les Transports en Commun de la Manche (ATCM).