Re: Signalling in Victoria

[markbau1@aol.comQQQQyuk (MarkBau1)]

<<<<<<> > Where you have say a junction and the signal shows red/red,
yellow/red &
> > green/red for one route or red/red, red/yellow & red/green apart from the
> > being a home signal would you say the signal has 5 aspects?
>
> No, this is just speed signalling. In most circumstances, the Normal speed (
?/r)
> would be shown for the "straight" line.

Victorian 3 position is all speed signalling.>>>>>>>>

This is debatable. Many, including signal Engineers, define speed signalling as
an additional proceed aspect behind a train,
G/R Y/G R/Y R/R 
instead of 
G/R Y/R R/R

I tend to agree with this definition.

OTOH, it is true that NOW VR 3 pos signalling only tells you speed and not
route (hence the need for route indicators at some locations) like it did when
introduced. 

Many people refer to Essendon to Newmarket as the introduction of speed
signalling as this was the first time a bottom light/arm did not mean you were
diverging and the rules were changed to reflect this new use of the bottom
light/arm.

Anyway, it's a delight to be able to ruminate about such things from half way
around the world!

Mark.


Visit my train pic website at:
http://home.earthlink.net/~markbau/