The following are instructions from a member on here. I copied them some years ago for getting through Rouen. They are easy to follow.The highlights I put on just to make it easier.
Rouen is big but very easy. Stay on the A28 down the hill and through the long tunnel;
get into the right hand lane (nearside in France) before or inside the tunnel, and HOLD THIS LANE straight ahead all the way to the River Bridge.
Still STAY IN YOUR LANE at the other end of the Bridge (there is another lane by now on your right, and one on your left), but slow right down because your lane loops off to the right VERY sharply down and under yourself, to put you on the D18E
through the industrial area of Sotteville(straight on at all lights and roundabouts) and out onto the Autoroute. Follow the signs for Paris, not Caen, after the last roundabout which means you want the LEFT lane.
Follow the Autoroute towards Paris for several miles; it's free at this point. Signs for Evreux will come up for Junction 19. Here you have another of Val's very small tolls to pay, and then it's all free dual carriageway to Evreux.
If it's useful, there's a filling station on the D18E out through Sotteville which sells at Supermarket prices; it's the first one you see. The next ones are full price!!