Autonomous cars do not solve traffic. Flying taxis will not solve traffic. Traffic is solved by abandoning the strange ideal of private cars/pick-up trucks with a single person inside.
It's the downtown-suburb hub-spoke city model, where everyone ends up on the road at the same time driving in the same direction.
Look at some cities designed from scratch with cars in mind like https://en.wikipedia.org/wiki/Irvine,_California The office complexes are decentralized, surrounded by shopping plazas, parks and schools which are then encircled by apartments, then semi-detached residences, and finally detached single family houses. Everyone with a job at one of the office parks can live closer to their specific job without affecting the traffic patterns of the other neighborhoods.
Even though it's very car-centric (with I-5 and 405 going through it), has next to zero public transport, is home to a regional airport, Irvine consistently ranks in the top 10 places for living / retiring / growing up / bringing up kids / park access metrics.
The interesting exception is commercial air travel, which to me embodies the worst parts of shared transit, yet is not considered socialist and dangerous here in the US.