Re: Signalling, was : Re: Outcomes of the Hines Hill crash.

David Bromage (dbromage@metz.une.edu.au)
19 Jun 1997 14:19:51 GMT

Krel (krel4203@netconnect.com.au) wrote:
>I'm not sure about that one but I would not be suprised. When speeds were
>metricated (metrified?) NSWPTC reckoned 60 mph was 100km/h but VicRail
>thought it was only 95km/h.

60mph is actually 96km/h, so 95km/h is closer. It was merely a matter
of convenience to round up to 100km/h for most systems. The
rollingstock formerly allowed 60mph in Victoria is now allowed
100km/h. Most systems rounded 70mph (112.5km/h) up to 115, but CR/ANR
rounded down to 110km/h.

>Also, in NSW mileposts were removed and kilometre posts installed but in
>Victoria a different solution was used - Mileposts were renamed marker
>posts and distances were reckoned from marker post xx and so many metres up
>to 1609metres when the next marker post would be found. These have since
>been replaced with kilometre posts but these are still referred to as
>marker posts.

IIRC, the zero post was moved when miles became kilometres.

>Signalling trivia question - do you know the method used to number
>automatic signals on the North East Standard Gauge and the Main West?

"The distinguishing number of an Automatic Signal is always prefixed by a
latter, a different letter being used on each Line.

"The distinguishing number represents, approximately, the distance of the
Automatic Signal in hundreds of feet from a "Zero" point at the East end
of Flinders-street (sic) Station ; Down Signals are given odd numbers and
Up Signals even numbers. Examples:-

R127 denotes a Down Automatic Signal at an approximate distance
of 12,700 feet from Melbourne.

B210 denotes an Up automatic Signal at an approximate distance of
21,000 feet from Melbourne."

(VR Book of Signals, 1967)

Cheers
David