Also, the river probably doesn’t suit the transportation of goods necessary for high population densities. Maybe an underground rail?
Okay, pal, go ahead and transport 30,000 kilos of produce upriver within the next 2 days 16 times and tell me how efficient this river idea works out.
Spoiler: It’s gonna be terrible.
The dutch have more than one road (surprising, I know). Removing the eyesore won’t impact their shipping and transport
Removing a 4 or 6 way interchange absolutely would impact shipping and transport, which is why I suggested underground rail as a replacement.
As neither of us are civil engineers, I’m going to stick with my intuition on this until you can provide proof of impact.