this post was submitted on 04 Nov 2023
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Noise is absolutely a concern for flying things. The reasons we don't yet have flying cars is not because they're too expensive, but because they're too loud. And this is specifically why the FAA won't let me commute to work in an ultralight.
The police want Bladerunner spinners so bad they can taste it. And the reason they can't have them — or more helicopters — is the noise.
That's not the only reason why flying cars haven't arrived. Getting a license to fly is about the price of a new car. Bad weather is no flying. Air Traffic Control can't handle thousands of commuters. Flying cars are pretty big so parking is going to be even more of an issue.
Also, imagine drunk flyers in bad weather.
Ground traffic collisions can also cause collateral damage, but more often than not those are constrained to the roads or their immediate vicinity where not many people live. An aerial collision may happen above residential areas, and even slight fender benders may mean a double crash (...on little Timmy mowing the lawn).
Also, there's no air bag in the world that can save you in a crash.
Road traffic is easy to direct and regulate with road signs, lanes, lights, painted lines. Good luck herding cats a hundred (hundreds of) yards above ground. It's not a huge problem with planes because there are not as many of them and they fly at vastly different altitudes. Not the case with personal flying cars.
With ground traffic, you only need two blinkers (or two sets). Some drivers even struggle with using that two properly. Good luck for getting them to use more.
And that's just the top of my head, I'm sure there are like 2634 other reasons.
They're working on next generation air traffic control, that is automated and also can handle drones whizzing around next to flying cars, but developing that isn't fast or cheap or deploy and will need extra equipment on the ground and in the cockpit.
...and that's still just for the drones.