Except self driving trucks can drive 24/7 and never take a break. You’ve seen those truck stops where there’s 30-40 trucks sitting idle while their drivers are sleeping and on mandated breaks? Wasteful.
If all cars are self driving we can eliminate red lights and traffic signals because of machine coordination.
Better utilisation of cars will lead to a 5x to 10x decrease in traffic, and route planning algorithms will optimise pickups and simultaneous package delivery.
Your car can go and ferry people around rather than sit idle taking up parking spaces while you’re at work (copy paste this for 200,000 workers in the city) and make you money
The car can go fuel and charge itself and drive itself to servicing and cleaning.