Transport trucks spend hours on interstates between points going in relatively straight lines, at relatively low traffic times.
The trucking industry will be dead 5-10 years after robot trucks start appearing on the road.
EDIT: Sorry "trucking industry" should be in quotes, as yes, by this I mean the idea of people driving trucks, which is 90% of the "industry". The actual industry itself isn't going anywhere, agreed. My fault in the miscommunication.