Coming from dieppe toward Rouen you will (hopefully) be on the N27, near a village called Totes you take the N29 and head west towards Yerville
Then, head to Yvetot,
From Yvetot
Take the D131 [3.5 miles]
Carry on the D490 [8.5 miles]
go over the bridge called the 'Pont de Brotonne'
Carry on the D913 [4.3 miles]
Carry on the D313 [8.8 miles]
in the direction of D313
'Bourg-Achard,Elbeuf,Bourgtheroulde-Infreville'
via Bourg-Achard
via Thuit-Hébert
In Bourgtheroulde-Infreville Go through the Route d'Elbeuf and turn right on the
N138 you will now be at Brionne on the normal route. Its about 30 miles and should take about an hour.
If that not clear
have a look at
www.mappy.com , you should be able to plot the route from Yvetot to Brionne there.