 The route between Nantes and Bordeaux will be via A83 between Nantes and Fontenay-le-Comte, the A831 between Fontenay-le-Comte and Rochefort, the A837 between Rochefort and Saintes and the A10 between Saintes and Bordeaux.In spite of the many different motorways involved the route will be shorter.A831 is currently only a proposal declared by a Public Utility Decree by the State Council on July 12, 2005.