Can't remember wether any of the A28 is toll road yet, but when using toll roads do not forget the favourite French trick of " les flics " standing at the toll booths and checking your start and finish times from your toll ticket, working out your average speed and Robert's your mother's brother a hefty Eurofine!
On a seriuos note they are being tough on speeding all over the country. There was a report earlier this year from the South of France of a motorcyle being clocked on the A* outside Nice at 260kph. The Gendarmes could not catch him, on the road but got him at the toll booths. They threw away both his bike and the key to his cell!
Be careful & don't get caughgt it coould spoil your weekend!