Somewhere between the Port of Oakland and a Central Valley warehouse, a 40-ton truck merges onto the interstate, ...
Somewhere in the scrubland between Kermit, Texas, and Lea County, New Mexico, a Kenworth semi loaded with fracturing sand is ...
It looked like just another big rig rolling down a Texas interstate, a sight that inspired a thousand country songs. But this delivery in May was different because there was no driver at the wheel.