As a network engineer who spends his days routing packets around the internets I find this hilarious. What if every intersection were to function as a sort of

As a network engineer who spends his days routing packets around the internets I find this hilarious. What if every intersection were to function as a sort of router with each road leading from it as a link? Then distribute routes between intersections and calculate shortest path using the Dijkstra algorithm(OSPF). They could even implement congestion control by having clogged intersections stop advertising routes periodically. Have a problem with cops, fire trucks and ambulances not getting through? Put them in a different QOS queue that prioritizes them. This is a solved problem in so many ways. They could literally buy these algorithms from people with decades of experience working on this class of problems.