Here are some excerpts from a recent report about fully autonomous trucks:

• “‘It’s not clear how quickly the costs for autonomous truck technology will come down,’ [Stephan Keese] said during the first day of the North American Automated Trucking Conference being held here at the Texas Motor Speedway.”
• “‘Several challenges exist to allow trucks to be either partially or fully self-driving, ‘Keese explained,’ some technological and some human.'”
• “Keese thinks it really won’t be until 2050 that self-driving trucks could be deployed.”
• “‘.. what will drivers do for 10 hours, sitting behind the wheel not driving, while being required enough to intervene ‘at a moment’s notice’ should something go wrong.’That is much more stressful that actual driving,’ he said. ‘It takes a driver 90 seconds to become ‘fully re-engaged’ after being unfocused; not just grabbing the steering wheel, which takes 2.5 seconds, but being able to process a situation.’“

http://fleetowner.com/technology/price-tag-autonomous-trucks-still-unclear