And as what railsigns was talking about, I wouldn't want to be the signaller who reroutes that train.
I'm sure that it would just be a case of the signallers putting their training into action, and that the appropriate counselling would be offered afterwards if it turns out to be a bad incident. If the appropriate screening is done to pick candidates who can handle pressurised situations and the training is good, there would be no hesitation to make the right calls at the time.
Controllers in Melbourne had a nasty one to deal with in 2003 (see the
Australian Transport Safety Bureau report) which involved a runaway EMU (which may or may not have had passengers on board) coasting downhill at speeds of over 100km/h, almost catching up to the service in front and then the best (or more accurately, least-worst) option being to crash it into another train in a terminus platform.
The general conclusion was that it was handled relatively well despite it being close enough to the worst possible situation short of terrorist action and there being no specific plan for a runaway train back then. There was very high praise for the driver of the service in front, who combined his traction and route knowledge to make a perfect judgement as to the margin over the normal rated speed he could safely take a turnout to clear away from the path of the runaway coming behind him.
I would not be at all surprised if some of the modern train designs delivered in recent years (i.e. since 9/11) would have the facility for an emergency stop to be remotely activated over a secure radio link from a control room. I do know that our suburban rail controllers in Adelaide do take part in simulation exercises with emergency/defence personnel including terrorism-related scenarios.
if it is a diesel there is always running out of fuel as well if it gets that far .
That sounds even less useful than turning off the electricity!
Is there some sort of niggling doubt in your head in regards to the brilliance, responsibility and god like status afforded to the dizzying heights of "Depot Driver" hence the necessity to remind everyone how important it is with every vaguely related post you make?
They obviously don't inspire a great level of faith if their management only let them drive around in depots that are kept safely isolated away from the big railway by trap/catch points
