The problem is, it is impossible to know where exactly the train is within a block of track, so it has to be assumed when coordinating traffic flow that the train is at the beginning of a block.
"I did exactly what the training had taught me," he said.
"Some fail to get involved with the colleges in finding out exactly what the training consists of.
The female rangers haven't really been documented before, although they do exactly the same training and work as their male colleagues.
We all like to think we're experts, and if somebody comes in that doesn't have exactly the same training that we do, we don't think they're qualified".
Mr Matthews said: "It's exactly the same training course as the officers get in the UK, so it's up to Her Majesty's Prison Service standards.
But a series of day returns from Manchester-Stafford (£20), Stafford-Wolverhampton (£5.80), Wolverhampton-Cheltenham (£22.30) and Cheltenham-Bristol (£8.20) are valid on exactly the same trains but cost only £56.30 Splitting tickets also works with no-frills airlines.
He imagines the person consulting the same schedule that's in his backpack, determining exactly when the train would be passing through.
It was uncertain what caused the derailment, and exactly what the train was carrying; many of the cars did not contain ethanol, officials said.
