RETB Inverness

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Introducion

The lines North and West of Inverness are controlled from a single workstation in Inverness Signalling Centre.

The Dingwall to Kyle line was the first to use Radio Electronic Token Block Signalling (RETB), being launched on 6 July 1984. The Far North Line to Wick and Thurso was converted to RETB in December 1985.

These routes were initially controlled from Dingwall, and it was intended that the Inverness resignalling scheme would included the Inverness - Dingwall section. However RETB was extended to Inverness with control moved to the new Inverness Signalling Centre in August 1988.

Inverness

This page describes the track layout and RETB signalling on these lines. Stations are shown in bold type.

RETB Signalling: Inverness - Wick

Controlled by Inverness Signalling Centre (RETB workstation)

Trains can enter the RETB system and obtain a token anywhere in the Inverness TCB area. Authority to proceed towards Clunes will be the clearing of the appropriate signal (I427 or I429) at the entry to the single line.

Clachnaharry's Down signal CY2 will only clear to green when an appropriate RETB token is issued.

Location
 
Mileage     
 
Radio
 Channel 
Signalling     
 
Remarks
 
Inverness Station 00mi 02ch
102
TCB (Inverness SC) Terminus. Platforms 5, 6 and 7 for the North.
Rose Street Jn 00mi 19ch Connection from 'Rose Street Curve', avoiding station.
00mi 32ch Down Signals I427, I429 Entry to the Single line
Ness Viaduct 00mi 41ch
00mi 47ch Up Signal I430 End of Radio Token Working (Up direction)
 
01mi 12ch Down Signal CY2 Start of Radio Token Working (Down direction)
Clachnaharry Canal Bridge 01mi 45ch Clachnaharry Bridge Box, controls Swing bridge and protecting signals
01mi 68ch Up Signal CY1
 
Bunchrew LC
03mi 58ch AOCL+B
 
Clunes IB
07mi 51ch
102
TEP-i
 
Beauly
10mi 12ch Single platform, Down side.
 
Muir of Ord
13mi 04ch
>105<
TEP (TPWS) Two platforms. Right-hand crossing loop (466m/1530ft). Down Siding, trailing. Up Siding, facing.
 
Conon Bridge
16mi 21ch Single platform, Up side.
 
Dingwall
18mi 58ch
102
TEP (TPWS) Two platforms, left-hand crossing loop (410m/1345ft), Down refuge siding.
Junction Points 18mi 76ch Power Operated junction points. Setting: Down Plunger, Up track circuit
Indications: B (Branch: Garve), M (Main: Invergordon)
 
Evanton IB
25mi 00ch
102
TEP-i (TPWS)
 
Alness
28mi 70ch Single platform, Down side.
 
Invergordon
31mi 37ch
102
TEP (TPWS) Two platforms, left-hand crossing loop (395m/1305ft). Up Siding, trailing.
Distillery No.1 GF 31mi 76ch Sdg-i Ground frame. Up sidings, facing.
Distillery No.2 GF 32mi 07ch Sdg-i Ground frame. Down sidings, trailing.
 
32mi 20ch
101
Change of radio channel
 
Delny LC
34mi 79ch AOCL
 
Nigg LC
39mi 25ch AHBC
 
Fearn
40mi 60ch
101
TEP-i Single platform, Up side. Up siding, trailing.
 
Tain
44mi 23ch
>112<
TEP (TPWS) Two platforms, left-hand crossing loop (255m/840ft). Down Siding, trailing.
 
44mi 36ch
113
Change of radio channel
 
Ardgay
57mi 70ch
113
TEP-i (TPWS) Two platforms, left-hand crossing loop (435m/1430ft). Down Siding, facing.
 
Culrain
61mi 00ch Single platform, Down side.
 
Invershin
61mi 34ch Single platform, Down side.
 
Lairg
66mi 78ch
113
TEP (TPWS) Two platforms, left-hand crossing loop (302m/990ft). Up Siding, trailing.
Lairg LC 67mi 07ch AOCL+B Driver's plunger on Lairg Down platform. (Also plungers for Shunting movements)
 
 
70mi 00ch
126
Change of radio channel
 
Acheilidh No.2 LC
72mi 63ch ABCL
 
Rovie LC
76mi 35ch AOCL
 
Rogart
77mi 01ch
126/112
TEP-i (TPWS) Two platforms, left-hand crossing loop (330m/1095ft). All Down trains must stop for Open Level Crossing
 
Kirkton LC
82mi 44ch AOCL+B
 
Golspie
84mi 30ch Single platform, Up side.
 
Dunrobin Castle
86mi 15ch Single platform, Up side.
 
Brora LC
90mi 31ch AOCL+B (Plunger for shunting movements)
Brora 90mi 48ch
112
TEP (TPWS) Two platforms, left-hand crossing loop (370m/1220ft). Up Siding, trailing.
 
Dalchalm LC
91mi 30ch AOCL+B
 
Helmsdale
101mi 40ch
112
TEP-i (TPWS) Two platforms, left-hand crossing loop (255m/840ft). Down Siding, trailing.
 
Marrel LC
102mi 38ch ABCL
 
Kildonan LC
111mi 03ch Open Level Crossing. All trains to stop, whistle and proceed
Kildonan 111mi 05ch Single platform, Up side.
 
Kinbrace
118mi 20ch
112/111
Single platform, Up side. Change of radio channel
Kinbrace LC 118mi 25ch AOCL+B
 
Forsinard LC
125mi 67ch AOCL+B (Plunger for shunting movements)
Forsinard 125mi 69ch
111
TEP (TPWS) Two platforms, left-hand crossing loop (250m/820ft). Up Siding, trailing.
 
Altnabrec GF
133mi 73ch
111
Sdg-i Up Siding, trailing (for Engineer's trolleys only).
Altnabrec 133mi 76ch Single Platform, Up side.
 
Scotscalder
143mi 02ch Single Platform, Down side.
 
Halkirk LC
145mi 59ch ABCL
 
Halkirk IB
146mi 53ch
111
TEP-i Down direction only. Combined with Distant board for Georgemas.
 
Georgemas Junction
147mi 20ch
111
TEP (TPWS) Two platforms, left-side Up loop (240m/800ft) ground frame controlled. Up Siding, trailing.
Power Operated junction points. Setting: Up plunger, Down track circuit.
Indications: B (Branch: Thurso), M (Main: Forsinard)
 
Bower IB
147mi 56ch
111
TEP-i Up direction only. Combined with Distant board for Georgemas.
 
Watten LC
153mi 68ch AOCL+B
 
Wick
161mi 36ch
111
TEP (TPWS) Single platform terminus. Loop controlled by ground frame. Down Sidings.

The power operated points at Georgemas Junction were installed in February 1999. Prior to this the junction was operated with a ground frame.

RETB Signalling: Georgemas Junction - Thurso

Controlled by Inverness Signalling Centre (RETB workstation)

Location
 
Mileage    
 
Radio
 Channel 
Signalling     
 
Remarks
 
Georgemas (Junction) 00mi 00ch
111
TEP (TPWS) Power Operated junction points. Setting: Down plunger, Up track circuit.
Indications: B (Branch: Thurso), M (Main: Forsinard)
Georgemas Branch 00mi 04ch
111
TEP-i Branch Stop Boards within Georgemas Station Limits.
 
Hoy LC
00mi 72ch AOCL+B
 
Thurso
06mi 50ch
111
TEP (TPWS) Single platform terminus. Loop controlled by ground frame. Down Sidings, Up 'Dock line'.


RETB Signalling: Dingwall - Kyle of Lochalsh

Controlled by Inverness Signalling Centre (RETB workstation)

Location
 
Mileage    
 
Radio
 Channel 
Signalling     
 
Remarks
 
 
Dingwall
00mi 00ch
102
TEP (TPWS) Two platforms, left-hand crossing loop (410m/1345ft), Down refuge siding.
Junction Points 00mi 19ch Power Operated junction points. Setting: Down Plunger, Up track circuit.
Indications: B (Branch: Kyle), M (Main: North Line)
Dingwall No.1 LC 00mi 57ch AOCL
Dingwall Middle LC 00mi 67ch AOCL+B
Dingwall No.2 LC 01mi 05ch AOCL+B
 
Fodderty IB
02mi 31ch
105
TEP-i (TPWS)
 
Achterneed LC
04mi 55ch AOCL+B
 
Garve
11mi 65ch
105
TEP (TPWS) Two platforms, left-hand crossing loop (240m/800ft). Up siding, facing.
Garve LC 11mi 72ch AOCL Driver's plunger on Garve Down platform, and plunger for Up direction Shunt.
 
Lochluichart
17mi 20ch Single platform, Up side.
 
Achanult
21mi 37ch Single platform, Up side.
 
Achansheen
27mi 72ch
105/104
TEP-i (TPWS) Two platforms, left-hand crossing loop (305m/1010ft). Up siding, trailing.
 
 
39mi 00ch
108
Change of radio channel
 
Achnashellach
40mi 34ch Single platform, Down side.
 
Balnacra LC
42mi 12ch AOCL+B
 
Blackwood No.2 LC
44mi 67ch ABCL
 
Strathcarron
45mi 74ch
108
TEP (TPWS) Two platforms, left-hand crossing loop (235m/780ft). Up siding, trailing.
Strathcarron LC 45mi 75ch AOCL+B Driver's plungers on Strathcarron platforms, and plunger for Up direction Shunt.
 
Attadale
48mi 22ch Single platform, Down side.
 
Stromeferry
53mi 15ch Single platform, Up side.
 
Duncraig
57mi 09ch Single platform, Down side.
 
Plockton
58mi 22ch Single platform, Up side.
 
Duirinish
59mi 58ch Single platform, Down side.
 
Kyle of Lochalsh   
63mi 64ch
108
TEP (TPWS) Two Terminal platforms. Loop and Platform 2 access by Ground frames. East (Down) siding. West (Up) siding.

Trains at Kyle normally arrive and depart from Platform 1 ('Up Platform' in the RETB system).

Signalling Notes

  • TCB: Track Circuit Block, controlled from Inverness Signalling Centre (I).
  • TEP: RETB Token Exchange Point with stop boards
  • TEP-i: Intermediate RETB Token Exchange Point. Trains with a 'Long Section' token may pass the stop board.
  • Sdg-i: Intermediate Siding with shut-in facillity.
  • TPWS: TEP equiped with Train Protection and Warning System. Blue light below Stop Board.
  • GF: Ground Frame (controls points).
  • Sidings: Out of Use
  • IB: Intermediate Block Post
  • LC: Level Crossing.
  • AOCL: Automatic Open Level Crossing, locally monitored by train driver (flashing white signal).
  • AOCL+B: Modified AOCL with addition of half barriers.
  • ABCL: Automatic Half Barrier Level Crossing, locally monitored by train driver (flashing white signal).
  • AHBC: Automatic Half Barrier Level Crossing, monitored at Signalling Centre.

RETB_Inverness.jpg ยป RETB workstation at Inverness Signalling Centre. August 2005 Photo by Aitken