Block 6 major highways around Paris and France is in a world of hurt.
4 or 5, maybe, up around Antwerp/Rotterdam and the supply chain E/W across Northern Europe is down. That serves the Venlo crossing into D.
To the East the Saarbruecken crossing into D (K-Town/Ramstein Autobahn) and the Muelhausen crossing into D (F/CH/D) border and Germany is cut off from the big West Coast harbors.
To the East, basically, shutting down the Salzburg crossing from A into D will take out the Southern Europe supply route. Italy trucking comes over the Brenner than loops around to the east from Inssbruck and back around to Salzburg because of the Mountains. SE Europe uses the S
alzburg crossing as well.
Playing with fire. The cities are for initial protest purposes, I think. It may be if that doesn't bring results the border crossings are next. Canada model, except taking out 3 or 4 crossings shuts down Germany, which is pretty much the entire European E/W corridor route.