ITM Maps has created this map of the Atlantic coast of France which focuses on Bikes and Cyclists, but also combines it with rail access.
All Motorways and Main highways are clearly shown. It's also two sided with the area from Spain north to Bordeaux and St-Etienne on Side A, while Side B covers from Angouleme and Clermont-Ferrand to Brittany and Paris.
As always, ITM includes a Top Attractions list (we highly recommend Mont St-Michel!).