RAVeL is the abbreviation for Réseau Autonome de Voies Lentes, or "independent network of slow routes". This name stands for a program of the Walloon region of Belgium to make towpaths, disused railway lines and other car-free paths usable as a hiking, horse riding and cycling network. In the system of traffic planning, RAVeL forms a third road network alongside - in official texts "after" - the RGG (motorways and expressways) and the RESI (roads for both motorized and non-motorized traffic).
In the German-Belgian border region, the Vennbahn route is used (RAVeL lines 48 and 47). These routes have been fully developed.