Going out there, I generally come off at the motorway at the junction just at the top of the hill into Rouen, and then follow the old N road down inbto the town and across the river further west, towards the industrial port, this then takes you straight onto a fast dual carriageway, pretty much as soon as you have crossed the river, which links up with the motorway - still takes you through a few sets of traffic lights, but they are fewer and it's a much quieter route.
MG Mark