Re: Tempe - Incorrect Signage?

["Chris Downs" <cvdowns@ozemail.com.au>]

BEE EFF <mcreely@pnc.com.au> wrote in message
3A860FF6.DF6BBAF4@pnc.com.au">news:3A860FF6.DF6BBAF4@pnc.com.au...
>
>
> Chris Downs wrote:
>
> >
> > Green over yellow is an ambiguous aspect (G/Y=1.5?).  If it were to
pulsate
> > for an advance junction indication and remain steady for the next signal
at
> > caution the ambiguity would be removed.  This doesn't excuse what happened
> > with SL-2 but the signals purpose is give the driver sufficient
information to
> > drive the train, not to exercise their mind in a game of second guesses.
> >
> > ....................and what was the official determination/explanation of
> > Concord West a few years ago?
> >
> > Chris
>
> Chris,
>
> What they have done on some signals now is to add rabbits ears(rows of white
> lights) above the upper set signal lights to indicate the direction of
travel .
>
> These are placed a couple of signals in advance of a turnout so that the
driver
> knows in advance of the turnout what is happening(very useful for large
> freighters-means you can maintain a constant speed  to clear the turnout
> quicker), some of these signals are at Cabramatta-2 indications(heading to
the
> city - via Granville or Rgents Park), Merrylands-3 indications(Y-link to
> Parramatta, over flyover to Granville/Clyde and wrong line to
Granville/Clyde).
>
> Drivers have been petitioning for a while to have these installed between
Rhodes
> and Concord West(heading towards the city for sometime, with no avail)as you
get
> 1.5 just after Rhodes which means the next signal could be 2 yellow(turning
out
> onto goods line)or 1(green over red)heading towards Strathfield(not good if
on a
> freighter as there is no way back to goods line without going via city
circle).
>
> Must say they remove a hell of a lot of ambiguity from driving trains and
should
> be installed everywhere(would make life easier for everybody- Freights and
> Electrics)and would no doubt speed the system up to no end.
>
> Hope this helps
>
> Regards BEE EFF

Thanks, definitely helps.

Next question:  What's the criteria for a turnout signal to display a Yellow
over Yellow aspect (eg down main and down suburban at Seven Hills for the down
Richmond branch) versus a Green over Green aspect for the turnout (such as the
up at Turrella)?  In both cases the preceding aspect has rabbit's ear(s),
albeit as Tezza pointed out the straight ahead ear at Turrella has been
covered despite some use I thought when initially installed and Seven Hills
have no straight ahead ear.

Is it speed, 60km/h+ or 70km/h+?

And did Turrella get its straight ahead ear originally because it was a Green
over Green for straight or turnout junction?

Ta

Chris