A comment from an article about cars that drive themselves:
“Everybody seems to be ignoring the 800 lb gorilla in the room. I have enjoyed this series of articles but have seen no mention either in the article or in the comments about why I think we will get autonomous vehicles sooner rather than later.
Freight. By weight, 80% of all goods sold in the US are transported by trucks. Because of the sheer number of trucks on the road, the amount of money saved by (i) the increased fuel efficiency of an AI driver and (ii) the increase in number of hours an individual truck can be operated, would be staggering.
Forget cars. Autonomous Trucks is where the money will be made and where we will see the greatest benefit.” http://www.wired.com/autopia/2012/02/autonomous-vehicles-q-and-a/