[gshdg]

Vehicle cost; fuel cost; takeoff and landing; handling of edge cases (there's a reason that commercial airlines still have pilots despite autopilot being very effective in 90% of conditions).

[dominotw]

how expensive would it be creating areas of road that only allows autonoums vehicles, something like carpool lanes we have now.

Wouldn't that cut problem size massively.

[frosted-flakes]

I can see that happening on major freeways, the way we have carpool lanes now, but not on a general scale.