I'll just throw in a few tips for driving in France.
The signage, including on the Autoroute, is generally by name of town/city and not by compass direction. This can be baffling if you know you want to head north but you have no idea whether, say, Le Mans is north or south of your current location. Since you can't know ahead of time which town/city will be on a sign that you'll be approaching at highway speed, it really pays to study the map before setting off and memorize the major towns/cities along your intended route.
Tolls are operated by different companies and they have different policies about accepting foreign credit cards. Some toll machines may not accept your VISA or MasterCard. To save headaches, have enough cash Euros on hand to cover your tolls, just in case.
Public parking lots are sometimes divided into cars-only (horizontal bar at entry that prevents buses & tall vans/trucks getting in) and separate lots for buses. Don't park in a bus lot -- the bus drivers resent having a car taking up one of their spaces and they may intentionally block you in and refuse to let you out until they're ready to leave. This happened to us as we didn't realize what the horizontal bar was for.