Mike Hodgson wrote:OK thanks.
Except in darkness a LV board is effectively the same thing as a tail lamp.
I suppose the probability and consequences of losing a vehicle without a brake problem being noticed are less than on the main line.
I don't think gravity trains are run in the hours of darkness.
The consequences are worse than on the main line. Far worse. Continuous falling gradient, sinuous curves, large areas of land where evacuation by train is the only possibility.
Just because the FR is narrow gauge, it does not mean that the risks are less - in many ways (and I don't say this lightly) the consequences of operating incidents mid section are much more ..involved.. than the main line.
Don't mistake a non-main line for less hazardous - the FR is incredibly safe and very highly maintained.