[dsnuh]

It is also checking brakes for functionality before you set out. There is an in-cab procedure too, not just a visual inspection. But I believe that both can be automated. The in-cab brake check is testing for certain pressures in the system under certain circumstances, and could be automated via software-hardware combo. The visual inspection could be done via a series of cameras under a bay the truck rolls over, with software to detect issues with the braking system components visually. Or either of these functions could be performed manually by a human at a waystation before the truck heads out on the (next leg of the) trip.