It is also hugely flawed. It implies the camera will be constantly watched. Who will do that and surely if there is one job more 'boring' and fatiguing than driving a train it is watching someone drive a train! And if they see a driver fall asleep what can they do about it?!
A completely ill thought out overreaction!
I can't see these feeds being watched live much of the time.
It would be impossible to watch each and every driver all the time without vast armies of inspectors sat at screens back at base doing the surveillance, so some sort of cyclical or random basis would have to apply. In any case I can't really see much benefit in having any serious numbers of inspectors sitting back at base rather than riding the network actually interacting and talking with drivers to better determine their fatigue levels and state of mind, so the practical result is that any individual feed would not be observed by humans very much of the time at all although there would be the constant potential that it might be. Live monitoring could usefully be triggered by events from other protection systems however, so if a vigilance device was not being operated in time, or a braking intervention was made by a speed control device, then the feed would be switched to the duty officer's screen. In that case it would initiate a dialogue anyway, eg:
After initiating event monitor light comes on.
'I see you had an emergency brake application, is everything ok?'
'yes sorry, my hand slipped from the controller - I'm building pressure again now'
'don't forget to notify the signaller'
Monitor light stays on for two minutes then is extinguished indicating live monitoring has ceased.
Otherwise it's a courtesy thing. In any kind of business it's perfectly acceptable for a manager or inspector to openly come and sit next to an employee 'to see how they deal with the next few customers' (say), but for the employee not to be interacted with, yet slowly get the feeling they are being hovered over by an authority figure just outside their personal space frankly can be rather creepy and possibly distracting, which is precisely the wrong kind of result in a safety-related occupation. The video thing, unless announced by a monitor light and probably a courtesy conversation would be equally odd, certainly in western cultures - I couldn't say what the response would be in China or Japan.