[sandworm101]

>> Can a machine monitor braking or perform the current brake check - absolutely.

I'm not sure you understand what a "brake check" means. It isn't checking the brakes for current functionality. It means a visual inspection of all the brake parts to ensure they aren't going to stop working somewhere literally down the road. It is checking for pins, debris, excessive or unusual wear, or leaks. It would require 3d vision backed up by some serious AI to understand what is going on. And you would probably need some sort of robotic actuator to remove any debris blocking inspection areas.

When you see a truck stopped by the road with the driver walking around the trailer, he is probably doing a legally mandated "brake check". It isn't just pumping the brakes to see they are still there.

[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.