If you're blasé about autonomous cars, don't throw self-driving trucks out with them. Both aim to automate activity on the same roads but the usefulness and likelihood of success for trucks outshines that of personal cars. The $720 billion US trucking business that employs 900,000 drivers (and would love to employ more) is at the heart of virtually everything in our economy; as Jimmy Hoffa said, "If you've got it, a truck brought it." Here are the main companies who may rewrite that bromide to "a truck brought it -- by itself." Otto's 2017 autonomous delivery of 52,000 cans of Budweiser captured headlines and started conversations.