Whats the road over Pont De Brotonne like - is this to be a CA recommended route?
I hadn't realised there was a bridge between Tancarville and Rouen, I thought it was all National Park
The bridge is by a village called Caudebec
If the road through Rouen is clear then this route is slower, and longer, however if you are going to hit Rouen during the morning or evening rush hour it is worth considering. Some extra tolls are involved, can't remember how much but it's not huge, as the motorway to Yvetot is paege, and there is a toll on the bridge itself.
Road south, D490/D913 to Bourg-Achard, is a pleasant run down the side of the Foret de Brotonne, part of the National Park. From here you have an option of dropping down to Bourgtheroulde to pick up the N138, or hopefully access the new motorway fairly easily near Bourg-Achard.
N.B. This is not a fast route, but prehaps more relaxing than a traffic jam in Rouen.