Airplanes don't need roads either, but airports do a lot more than just provide hangars to store them and runways for them to take off and land. There's all kin

Airplanes don't need roads either, but airports do a lot more than just provide hangars to store them and runways for them to take off and land. There's all kinds of systems to help planes avoid collisions too. You might think it'll be very easy for flying cars to avoid crashing because they can just fly above and below each other, but that's also more directions for them to crash into each other from, more directions the drivers might have to rely on potentially faulty sensors where their vision is blocked. There might have to be invisible "lanes", maybe even with something like traffic lights, rather than having cars just flying every which way without external coordination.