self-driving truck

First it was google's self-driving car and now a semi that can deliver beer without a driver.  Budweiser had the truck built and it rolled out for it's first journey.  It's route took it from Fort Collins, CO through Denver and ended in Colorado Springs.  There was a licensed professional truck driver on board throughout the entire time to monitor the trip.  I'd have to take a double take if I saw any vehicle driving down the road without a driver.  here comes the beer