It's not the driverless car that stands to make some money. It's the driverless truck. The most expensive part of the truck is the driver and his paycheck, breaks, insurnace, training, and Teamster affiliations; the most restrictive part is the 10 hours of driving time per day, and the limitations of total time behind the wheel.
Now imagine getting rid of that driver in four out of five trucks (so far, the lead truck needs a driver and the rest follow).
Suddenly, you have a vehicle that can drive 24/7 if the lead driver changes or trades off with a partner. It doesn't get tired and it stops only to refuel. You don't have to pay for a person. Trucking companies will cut expenses by 40%.
Let the scare-mongering begin !