Re: Signalling Questions in Brisbane?

[signal_spotter@my-deja.com]

In article <3960875E.603964C@efs.mq.edu.au>,
  Eddie Oliver <eoliver@efs.mq.edu.au> wrote:
> signal_spotter@my-deja.com wrote:
>
> > >
> > I disagree. The order of aspects in QR (and UK which QR signalling
is
> > 99% based upon) from most restrictive to least restrictive is:- Red,
> > Yellow, Flashing Yellow, Double Yellow, Flashing Double Yellow and
> > Green. This is how the aspect codes are written in SSI for the
signal
> > memory.
>
> Well, if you write your SSI codes like that in Brisbane, you might
just
> have a few problems. The use of flashing yellow in Brisbane is NOTHING
> like the use in Britain - on QR it is more or less the equivalent of a
> NSW low speed for restricted overlap conditions (except that the
> permitted speed is faster), whereas in the UK it is an indication of
an
> approach-cleared junction signal ahead. And QR has no use for flashing
> double yellows, which in the UK situation are an advance warning of a
> flashing single yellow; presumably all QR flashing yellows are
preceded
> by a steady single yellow.
>
> Eddie
>

So why has QR taken a system  that they're 99% familiar with and added
the complexity of a BR system that they're not familiar  with  to it.

regards ian
Signal Design Engineer


Sent via Deja.com http://www.deja.com/
Before you buy.