Rail usage has rocketed since the 1990s, so I'd also like to know when the last tests were. As well as the finer details like, as hinted at already, when you have empty trains going against the main flow.
And in the working week, I can get on a stopper service to Moorgate from WGC around 11-11.30 and be almost the only person on it or a lot of the way. Should these trains be axed in the week? [on the contrary, from 2018 we'll have twice the frequency of potentially empty trains at this time].
And while the last train can be very busy, some evening trains are pretty quiet in the week. Should they go? The fact I'll be jumped on for saying something so stupid sort of proves my point. Obviously, no, they shouldn't.
One reason local buses suffer and often end up cut is operators (or councils through funding cuts) axe the quiet services and expect to run the profitable ones only (like ending evening services altogether). They then wonder why the busy buses get emptier, oblivious to the fact that people won't use a bus in the morning to get to work if they haven't got one to get home. They'll seek another method of transport.
I always assumed the railway knew better than this. That's why you usually have good service provision for a whole day, with the acceptance that many won't be that busy - especially 'going the other way'. Sometimes such services will run empty, but in many cases there's no massive impact in having them in public service.
If shops are shamed into closing on Boxing Day and sporting events put off until the 27th, maybe the argument for trains will fall, as clearly nobody cares about the other people who need to travel.
I know workers at the nearby Ocado that have to take taxis on some days to work their shifts because there's no public transport, and they can pay more than they'll earn that shift. But they have to do it because to miss a shift will potentially lead to them being sacked.