"Clive D. W. Feather" wrote:

No: an open level crossing is not counted as an obstruction in the
overlap (unless, of course, there's a problem such as a broken-down
car), so trains can be signalled up to a red signal right at the
crossing.

Thanks. What exactly do you mean by an "open" level crossing?

Do you mean that Open level crossings (ie those without gates or barriers)
don't count crossing road traffic as an obstruction, but level crossings
*with* gates or barriers do? This might account for the different practices
I've observed on the T&W Metro (no barriers) and at Higham's Park (full
barriers). Or do you mean that *any* level crossing that is open for road
traffic to cross the line (whether or not it has gates or barriers) does not
count as an obstruction in the overlap?

If the latter, is any signalling consideration given to protecting road
traffic from trains overshooting, even if such protection isn't formally
part of the signal overlap (eg, the formal overlap extends 400m beyond the
signal, but the level crossing only has to be closed to road traffic before
the train arrives if it is less than 200m from the signal)?



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MetroGnome
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