Imagine a noise of your "flying car" taking off, reaching to the houses underneath from above. Unobstructed by buildings or trees. A bullet from a less privileged neighborhood, over which a flight path is sets intercepts it. Fire starts, ballistic parachute fires and deploys, but the "flying car" collides with a light pole, in an uncontrolled landing. Your last wish is - you'd listened in 2019 and financed a tunnel instead ;)