Re: [NSW] Olympic Park/City Railway Signalling Question

["Bernard Smith" <epping.smiths@gatewaynet.bigpond.com>]

"Chris Downs" <cvdowns@ozemail.com.au> wrote in message
%iAG5.39748$O7.498334@ozemail.com.au">news:%iAG5.39748$O7.498334@ozemail.com.au...
> FIRST STOP CENTRAL provides no further information but implies a low speed
> indication.

Yes, Red over Red over Green.

> My recollection is (and I can't swear on a stack of Airport Line
timetables
> that this is correct) that an 8 car single deck set was delayed at
Wynyard's
> platform 6.  The following train closed right up to the last signal before
> entering the platform ( literally several metres behind the 1st train).

In the absence of intermediate trainstops just outside the platform, I am
surprised.  Unless the driver had permission to pass the previous signal at
Stop.

> 1st train departed slowly and before clearing the station the 2nd train
was
> just starting to enter the platform.  As I wrote this is years ago, I was
> watching both ends of the platform (beat going straight to school after
the
> tooth doctor), I just remember being amazed at what I thought I'd
witnessed.

I would think the 1st train would have to have cleared the last 2 trainstops
before the 2nd train could enter.  They could both be in the station if the
1st departed <very> slowly,

> I thought Railway Quiz (1966 ed.) may help but it doesn't explicitly.  It
> does state "In order to reduce the effect of station stops on the headway
of
> trains, intermediate train stops are provided at all City stations, with
the
> exception of Museum.  If the signal at the end of the station is at 'low
> speed' indication, then the train must pass the four train stops at a
> maximum of 17 m.p.h. for the first two train stops, 12 m.p.h. for the
third
> and 9 m.p.h. past the last stop, otherwise the train will be brought to a
> stand before reaching the end of the station."  Again "the end of the
> station" is ambiguous, I assume it means on entry to the station.

No, it means the departure end of the platform.  That is, the train may trip
halfway along the platform.