Does anyone know what this work is about ???
Many thanks for thatThe Rooty Hill project involves bidirectional running down the Up Main (really the Slow) lines.
The Rooty Hill project involves bidirectional running down the Up Main (really the Slow) lines.As I understand it, the working will NOT be bi-directional, rather the train will proceed to St Marys, run round and enter the siding via a track release, similar to James Siding at Cooks River.
Prior to CBI (computer based interlockings) a big cost would have been the installation of a lot of cable from Blacktown to Rooty Hill.
With CBI , track circuits, signals, points, etc., are connected to the interlocking by a kind of "network" over a single pair of wires, and such a pair is bound to be found in the communications cables, which is bound to have a few spares.
The BiDi working eliminates the need for a ladder crossover from the Down Suburban (really the Fast) line across the USub to the UMain.
Should the quarry trains be Top-and-Tail with locos at both ends, the train could run from Blacktown to St Marys, where it would reverse to reach Rooty Hill, this eliminating the need for the BiDi signals.
As I understand it, the working will NOT be bi-directional, rather the train will proceed to St Marys, run round and enter the siding via a track release, similar to James Siding at Cooks River.
Correct the train will proceed to St Marys, under Push Pull combination. The Locomotives will be hard wired to each other via cable running between the wagons . The train will run into the old Rope's Creek branch, The crew will change ends and wait for their path to Rooty hill.
No Bi DI ,No Run-around
Some details from a document floating around:
- The Holcim Siding Rooty Hill will be connected to the Up main line at approximately 39.491Km via a trailing crossover.
- A hard-wired release push button will be provided at St Marys Signal Box to permit moves from the Siding to the Main Line. A release is not required for permitting moves from the Main Line to the Siding. The push button will be interfaced to the Microlok via the existing Dupline system.
- Two new shunt signals RH3 and RH4 will be provided for entry and exit to the siding respectively.
- A Points Cleared Board will be provided on the Up Main cess side to indicate to the driver where to stop to ensure the rear of the train is clear of shunt signal RH3. The board will be placed to allow for a train of 530m maximum length.
From the diagrams I've seen, it looks like trains will head east from Rooty Hill towards Doonside on the Up Main, clear the points of the new siding, then head into the sidings back west towards Rooty Hill
Went past the site this morning. The turnout is installed on the up local, along with about 100m of the headshunt and another turnout on the siding. The lineside is cleared for about 20m from the running lines, but I couldn't distinguish anything rail-related happening beyond the tree-line.
Anyone know when the rest of the works are due to be completed?
Any updates on construction progress at the Readymix-Cemex-Holcim gravel terminal?
Is the contractor at Rooty Hill the same that undertook work at Lynwood?
1 x PacNat 48 class (Freight Corp Blue - 48130? i think) and three or four hoppers standing in the siding, near the unloading point.
I understand last night a train was worked push-pull to St Marys and back to Rooty Hill, with the other loco running light back to Clyde/Chullora. Perhaps the loco/wagons there will also be used for crew training in coming days, training the workers in unloading of the wagons and how the equipment at the unloading point works?