Re: Signalling in Victoria

[cmgord@ecr.mu.oz.au (Christopher_Martin GORDON)]

Ok, just a couple more questions about 2 position signalling.  The numbers on
the signal posts are usually the lever number, and where there are many levers 
the first lever number is on the post.  Is this correct?  If so then in places 
like Sunbury the lever (switch) number has no relationship with the post 
number.

Disc and dawf signals. Most sidings and wrong line moves have/had disc 
signals, if you have a colour light signal is it called a disc, or a two 
position dawf?

Eltham has two homes (on for each road) and a dawf/disc for the sidings, this 
is a little like the Showgrounds (ie it has a 'siding' sign and it normally 
off, but shows yellow for moves into the sidings), I spose in the days of 
semaphore signals this would have been a disc.


Now three position signalling.  Where you have a signal that shows red/red, 
yellow/red & green/red it is three aspect signalling?

Where you have red/red, red/yellow, yellow/green & green/red it is four aspect 
signalling?

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?

Signals the clear in the following order: red/red, red/yellow, yellow/red, 
yellow/green, & green/red (I think that is right) it has the yellow/red aspect 
because a full overlap is provided after the train has past some point, but 
the next signal is still red/red.

All dawf signals are three position (in three position signalling area) but 
some only show two aspects.  The signals at either end of the centre road of 
Clifton Hill are three aspect with trip levers.  Are these dawfs, or home 
signals, or something else?


Transition from Two position signalling to three position, sometimes it is 
like Greensbourgh where there is a home to post X and then post X is a three 
position signal.

Or like St Albans where you have a home signal, repeating, then a three 
position home.  I think the repeating signal is like a distant (but with a 
yellow marker).  Is that right?

What colour are the arms on a semaphore repeating signal?  I know of only one 
semaphore repeating that was at Maldon Junction any I have no idea what colour 
the arms were.  The top arm was fixed at yellow, and the bottom yellow or 
green.


Well that's all I need to know for now (until I am totally confused again)

Regards,



--
Chris Gordon
http://www.ecr.mu.oz.au/~cmgord