Speaking to a driver this afternoon & it seems there are mixed views on these. They can monitor every action the driver takes. Brakes being applied, engine revs, signalling. Basically anything that is "tied" into the buses electrical system.
It is being viewed as another way of following the drivers. But it can also be used, with the cameras(inboard & outboard) as evidence in any collision.
atbman
I never said that the buses didn't run outside of the city centre. But the majority of services start & end there. Which is why I mentioned the traffic light situation.