FUNDS ON TRACK: $1.05 million commitment to upgrade Rail Triangle

 
  NSWGR8022 Chief Train Controller

Location: From the lands of Journalism and Free Speech
A $1.05 million commitment to upgrade the Dubbo Rail Triangle will cut congestion and increase freight efficiency, according to Dubbo MP and Deputy Premier Troy Grant.

The investment by the state government, in collaboration with the Australian Rail Track Corporation, will fund new signals, as well as the automation of switches.

Currently, trains have to come to a complete stop while the switches are operated manually, causing lengthy delays to motorists at the Cobbora Road and Wheeler’s Lane level crossings.
FUNDS ON TRACK: $1.05 million commitment to upgrade Rail Triangle

Dubbo still has a local signal box. Must be still manual interlocking?

Does the amount of rail traffic these days justify the upgrade?

Sponsored advertisement

  awsgc24 Minister for Railways

Location: Sydney
Dubbo still has a local signal box. Must be still manual interlocking?

Does the amount of rail traffic these days justify the upgrade?
NSWGR8022

However, Dubbo has electric signals and point(s) between there and Troy Junction and East Junction. So installing electric signalling on the triangle would be relatively easy. The opportunity might be taken to remote control everything from Junee (?).

The Dubbo signal box has about 24 mechanical levers. There is also a large Frame B.

Another advantage of signalling the triangle might be to allow longer trains; the run round loop at Dubbo station might impose a length limit on freight trains.
  awsgc24 Minister for Railways

Location: Sydney
Another advantage of signalling the triangle might be to allow longer trains; the run round loop at Dubbo station might impose a length limit on freight trains.
awsgc24

Ah ha. The run round loop is 664m long.

See: http://www.sa-trackandsignal.net/Pdf%20files/ARTC/AR455.pdf for triangle.

See: http://www.sa-trackandsignal.net/Pdf%20files/ARTC/AR454.pdf for Dubbo station.
  awsgc24 Minister for Railways

Location: Sydney
See: http://www.sa-trackandsignal.net/Pdf%20files/ARTC/AR455.pdf for triangle.

See: http://www.sa-trackandsignal.net/Pdf%20files/ARTC/AR454.pdf for Dubbo station.
awsgc24

The above diagrams show that Dubbo now has many, many more interlocked points and signals that could possible be operated from the former mechanical signal box. This suggests that there is now a Computer Based Interlocking (CBI). With this plus lots of relay rooms, cables and cable troughing, and power supplies, suggests that the two extra points and a couple of new signals, there will be no real problem in motorising Frames K and Z at each end of the triangle. If there aren't enough spare cables, and if the power supplies to K and Z are not strong enough, there could be some issues.
  awsgc24 Minister for Railways

Location: Sydney
The price of this triangle upgrade will probably have to include rerailing and resleepering, as this hitherto lightly used track is bound to be in poor condition. This leg of the triangle is also probably on a sharp 10chain (200m) curve.
  2LaGrange Train Controller

The price of this triangle upgrade will probably have to include rerailing and resleepering, as this hitherto lightly used track is bound to be in poor condition. This leg of the triangle is also probably on a sharp 10chain (200m) curve.
awsgc24


Dubbo has not had a signal box in use for many years.

All Interlockings and Signals are controlled by ARTC at Broadmeadow including the releases for K and Z frames.

I doubt that the price would include resleepering and rerailing as the track is ok between K and Z frames and sees rail traffic most days and on some days more than once in a 24hr period.

The cost would be just to signal and motorise the points to remove each frame and all the associated wiring for power/signals ect involved in intergrating them into whats already in use at Dubbo.


Rail traffic that uses this part of Dubbo triangle includes QUBE containerised Cotton and Grain trains from Coonamble branch heading to Port Botany, Westons Grain trains off branch that go to Enfield, also the Flechers Train to Port Botany that runs 3 return services a week. Plus occasional PN Grain Services.

Quite a busy Junction that should have had K and Z frame removed and points motorised and signalled when the rest of Dubbo was done 20 odd years ago.

When it is done it will certainly speed up the transit of freight trains through Dubbo and reduce delays at Cobborah Rd level crossing in Dubbo.
  awsgc24 Minister for Railways

Location: Sydney

Quite a busy Junction that should have had K and Z frame removed and points motorised and signalled when the rest of Dubbo was done 20 odd years ago.

2LaGrange

The numbering of points and signals at Dubbo does not even allow for K and Z to be renumbered in a tidy order.
  awsgc24 Minister for Railways

Location: Sydney
The following diagram shows the resignalling of the triangle.

See: http://www.sa-trackandsignal.net/Pdf%20files/ARTC/AR455.pdf

It is a very lean scheme. There are no extra signals leaving East Fork, so that trains probably cannot stand on East Fork while trains move on the other two sides of the triangle.

4 Extra signals would be required to obtain full flexibility, so there is considerable cost savings leaving them out.
  cootanee Chief Commissioner

Location: Waiting for the sky to fall, the seas to rise... and seeing a train on the SSFL!
...
It is a very lean scheme. ...
awsgc24
The reality of non urban rail funding in 2015.This amount qualifies as a significant investment in rail.
  freightgate Minister for Railways

Location: Albury, New South Wales
Hard to workout the actual changes. Very few signals.
  awsgc24 Minister for Railways

Location: Sydney
Hard to workout the actual changes. Very few signals.
freightgate

112 and 114 are turnouts converted to power operation; catchpoints are removed.

Signal DO42 has a new steady/flashing band of yellow; also a new shunt aspect with route indicator.

Signal DO43 I think is a new signal between DO1 and DO2. It would have a flashing band of yellow.

Signal DO1 has a new "Junction Repeater" in advance of DO43.

There may be a new track circuit over the East Fork of the triangle.


New or strengthened power supplies may be needed for 112 and 114 points and for DO43 signal.


New hubs from the Computer Based Interlocking may be needed for the new points and signal, if indeed they do not already exist. The amount of extra cabling is hard to determine as such details are not show on driver's diagrams.

Sponsored advertisement

Subscribers: awsgc24, NSWGR8022

Display from:   

Quick Reply

We've disabled Quick Reply for this thread as it was last updated more than six months ago.