The approach that Starsky ( http://starsky.io/ ) is taking seems to be a promising one. They employ truck drivers as remote pilots for the "first and last mile", i.e. the local roads and loading dock work that autonomous vehicles struggle with most. Other advantages include lower fuel costs (driving slower because AVs aren't subject to operator-hour limits) and probably also lower labor costs (you don't need to pay t…
The long haul stuff should go on rails anyway. It's very wasteful to run it on the interstates. The majority of the fatigue damage to the highways comes from trucks, then there's all the rubber dust, fuel inefficiency, etc. The trailers should just be picked up and dropped on flatcars, and trucks used for intracity last mile stuff.
Would it have been a better solution? Probably, but the investment required (laying down the rails, land buyouts, copious use of emanate domain, political greasing of the wheels, etc...) has always been prohibitive. The gains would be shared between many disparate groups that would need to fund this together, taking years to decades for any ROI - certainly a longer time-frame than most publicly traded, quarterly measured, corporations can afford. At the least this would have required some government subsidization.
With driver-less tech around the corner, returns on this investment for any one company become even more dubious, and thus make it less likely to happen. I think the parent comment here will always get some up-votes, but that is as far as I see this going anymore. Maybe it'd go farther if we threw in words like 'Hyperloop' ;)