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The motorway is operated by Autoroutes du Sud de la France (ASF) and links Balbigny to Saint-Étienne on one of the steepest and meandrous motorways in France. Over 35 km (22 mi) of the motorway is limited to 110 km/h (70 mph) as sections are considered too dangerous for the standard 130 km/h (80 mph) speed limit.
The motorway has 2 lanes both directions with 3 lane sections near Saint-Étienne.
The road is also numbered the European routeE70. In 2006, the section between Clermont-Ferrand and the A89 spur became part of the A89.
This article contains a bulleted list or table of intersections which should be presented in a properly formatted junction table. Please consult this guideline for information on how to create one. Please improve this article if you can.(December 2021)
