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Re: Three Position Signalling
- Subject: Re: Three Position Signalling
- From: David Guymer <davidmg@optusnet.com.au>
- Date: Tue, 05 Oct 1999 17:49:15 +1000
- Newsgroups: aus.rail
- Organization: Optus Internet
- References: <7ss441$jfi$1@mulga.cs.mu.OZ.AU> <daiI3.2$Ba1.481@nsw.nnrp.telstra.net> <37F21978.D8249EF6@ancc.com.au> <7suk60$oc0$1@mulga.cs.mu.OZ.AU> <7sus6d$t8b$1@mulga.cs.mu.OZ.AU> <7suurb$kq4$1@otis.netspace.net.au> <7svii3$da2$1@mulga.cs.mu.OZ.AU> <37F42D30.7625C198@tig.com.au> <7t1l1j$406$2@mulga.cs.mu.OZ.AU> <7t9990$2ceb$1@otis.netspace.net.au>
Exnarc wrote:
> snip
>
> There are (at least) 3 locations where 2 Position Dwarfs show a Yellow
> Light.
>
> 1: Portland.
>
> 2: Showgrounds. From Platform to Up Refuge Siding.
>
> 3 Newport. Dual Gauge to Anzac Siding.
>
> They are mounted on the same post as a Home Signal and only light up when
> the signal is pulled off. Unlike a Calling On signal they do not read to the
> same road as the Home signal, but other than that they look the same,
> except, they have the word "Siding" painted on or attached to the target..
>
> The purpose of these signals resulted from the need to find a replacement
> for the mechanical Disc signal, so the Siding Dwarf was developed.
>
Not quite the Dwarf at Epsom Rd (Showgrounds) existed well before it was written
into the rule book. I don't know why the powers that were decided to finally
include this anomaly in the rule book but it was certainly after the fact.
David G.