Complexity theoretical, security and latency wise this sounds like a great plan. Can wait for people being stuck in cars for days because the freeway offramps are causing livelocks. (Like the example of the waymo cars all honking at each other at the parking lots).
Wonder if they are going to use the routing solutions used in tcp and then discover that cars are heavier and slower than data and suddenly waste a lot of peoples time and money.
E: small little detail which I don't know if other countries also have it, but in the dutch traffic system, emergency services and busses (and perhaps a few hackers who really want to be in trouble with the law (but I always heard this described as a 'this exist, but we don't mess with it' system)) have a system where you can get priority at traffic lights, so they turn green faster. Wonder if other countries have this, and how much they realize this will not work for waymo systems.
Unifying belgium and the Netherlands makes me think really bad things about the map designers. People who want that are either fools who dont know much about the region or white nationalist fascists. (They often also want SA included)