For any questions regarding works, road maintenance, or a road issue in the Yvelines, the Department has provided the telephone service Allô Routes 78 since October 13, 2026. This new service can be reached at 01 39 07 58 35.
It is not always easy to know who to contact when encountering a problem on municipal, departmental, or national roads, as the relevant contacts can differ. Allô Routes 78 aims to simplify these procedures.
Through this service, users can contact an advisor who will listen to their request and direct them to the appropriate department. It is important to note that this service is for information and guidance, and is not an emergency intervention number.
