[dispose13432]

Why do you think the airspace won't have traffic?

You want to end traffic with modern accessible tech?

Build ten layer freeways.

[Spooky23]

As New York City first discovered when the Triborough Bridge was built, more highway capacity generates more traffic.

Today only the Uber-rich can afford short haul flying. With a airtaxi/flying car scenario, just about anyone could fly across their metro area for some special occasion.