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Re:SpaceX Profitable as Musk Pulls in NASA Contracts, Google... by lazaroclapp on Wednesday March 04, 2015 @06:22PM (#9148140)
You forget transportation of goods. Pretty much all over-land cargo in the U.S. and most of that elsewhere (less so, because trains) could be transported by self-driving cars/drones. Not sure if that is larger or smaller than transportation of people at this point, but it's still an astronomically huge market.
Re:SpaceX Profitable as Musk Pulls in NASA Contracts, Google... by eru on Wednesday March 04, 2015 @10:38PM (#9149095)
US is actually pretty big in freight trains.

Mostly because, freight and passenger trains interfere badly. No passengers = easier freight. A big wave of deregulation of the market a few decades ago helped, too. The Economist ran a special about the US market a few years ago.

Re:SpaceX Profitable as Musk Pulls in NASA Contracts, Google... by manicdee on Wednesday March 04, 2015 @06:56PM (#9148310)
Transport is something like 30% of the world economy isn't it?