The Alpine rolling highway (French: autoroute ferroviaire alpine (AFA)) is a combined transport service, in the form of a rolling highway on special wagons traveling a distance of 175 km between France and Italy by the Mont Cenis Tunnel (aka Fréjus rail tunnel).
The service has been operated since 2003 by Autostrada ferroviaria alpina (AFA), a subsidiary of SNCF and Trenitalia.
This service, operated from November 4, 2003 by a private company Autostrada ferroviaria alpina (AFA), a joint subsidiary of the SNCF and Trenitalia, offers four daily shuttles between two loading platforms located in Aiton (Savoie) in the Maurienne valley and Orbassano (a suburb of Turin), using the metals of the Culoz-Modane railway and the Turin–Modane railway. Given the limited loading gauge at the beginning of the service only tankers could be transported.
The Alpine rolling highway was subsidized, with the agreement of the European Union, by the French and Italian states for a trial period until 2006. In fall 2008, the fill rate approached 100% for four daily shuttles. Despite the sharp downturn in the freight transport (both rail and road), the hundred thousandth truck was carried in July 2009, and the fill rate remained relatively high (above 70%).
Following the fire in the Fréjus road tunnel on 4 June 2005 which led to the closure of the tunnel and the drastic reduction in road transit capacity across the Alps between France and Italy, including the ban on the transport of dangerous substances in the Mont Blanc tunnel, various measures were considered to increase the capacity of the service, in particular the establishment of a fifth daily rotation. However there were constraints, including the capacity of the line at that time operated in single track mode in the Fréjus tunnel because of construction work, and the need to ensure continuity of existing rail traffic, passenger and intermodal and standard freight.