Approach Lit Signals
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These signals are normally unlit (displaying no aspect), unless a route towards the signal has been set, or a train is standing on the berth track circuit for the signal.
They are used where same direction movements can take place on parallel lines, but where the main line has no corresponding signal.
The use of approach lit signals fell out of favour for new installations in the 1990s, but has again been permitted since 2003.
Most remaining approach lit signals in England were converted to continuously lit in the 1990s, one remains in the Gloucester area (G121, Haresfield Down Goods Loop), and another exists at Rickmansworth on the shared Metropolitan/Chiltern route.
A novel use of an approach lit signal was commissioned at Midcalder Junction in May 2013, when the Junction was re-doubled.
Bi-directional capability was retained on the Down Shotts connection, whilst the former Goods Loop became part of the Up Shotts.
Signal EJ720 on the Up Shotts is a 3-aspect (R/Y/G) stop signal, but a parallel signal on the Down shotts, EJ718, is an approach lit 2-aspect (Y/G) distant signal.
This has been done to avoid EJ718 having a red aspect that is not requred to control train movements, but may have caused confusion with respect to the old layout.
They are used where same direction movements can take place on parallel lines, but where the main line has no corresponding signal.
The use of approach lit signals fell out of favour for new installations in the 1990s, but has again been permitted since 2003.
Most remaining approach lit signals in England were converted to continuously lit in the 1990s, one remains in the Gloucester area (G121, Haresfield Down Goods Loop), and another exists at Rickmansworth on the shared Metropolitan/Chiltern route.
A novel use of an approach lit signal was commissioned at Midcalder Junction in May 2013, when the Junction was re-doubled.
Bi-directional capability was retained on the Down Shotts connection, whilst the former Goods Loop became part of the Up Shotts.
Signal EJ720 on the Up Shotts is a 3-aspect (R/Y/G) stop signal, but a parallel signal on the Down shotts, EJ718, is an approach lit 2-aspect (Y/G) distant signal.
This has been done to avoid EJ718 having a red aspect that is not requred to control train movements, but may have caused confusion with respect to the old layout.
A list of Approach Lit Signals in Scotland.
Signal | Location | Direction | Year installed | Remarks |
AK304 | Kincraig Loop | Up | 1979 | |
AK305 | Kincraig Loop | Down | 1979 | |
AC334 | Carrbridge Loop | Up | 1979 | 138y from end of platform 2. |
AC335 | Carrbridge Loop | Down | 1979 | Platform 2 |
AS344 | Slochd Summit Loop | Up | 1979 | |
AS345 | Slochd Summit Loop | Down | 1979 | |
AT354 | Tomatin Loop | Up | 1980 | |
AT355 | Tomatin Loop | Down | 1980 | |
AM364 | Moy Loop | Up | 1979 | |
AM365 | Moy Loop | Down | 1979 | |
EB671 | Ladybank, Branch Loop | Down | 1980 | |
EV426 | Inverkeithing Up Passenger Loop | Up | 1979 | |
EY655 | Dalmeny, Up Passenger Loop | Down | 1979 | Fixed red, ground level. |
EY657 | Dalmeny, Down Passenger Loop | Down | 1979 | |
EP624 | Powderhall Branch Junction | Up | 1989? | Adjacent to ECML |
EN583 | Bathgate Freight line | Down | 1986 | Removed Oct. 2008 |
EN2043 | Bathgate station, Up line | Down | 2010 | Fixed Red, for reversing trains. Signalling Plan. |
EJ718 | Midcalder Junction, Down Shotts | Up | 2013 | Distant Signal, parallel with EJ720. |
M155 | Newton, Down South Goods Loop | Down | 1973 | Removed 1991. |
M146 | Newton, North Connecting Line | Up | 1991 | Changed to continuously lit, 1994? |
M165 | Newton, South Connecting Line | Down | 1991 | Changed to continuously lit, 1994? |
MC410 | Ravenstruther, Down Main | Up | 1989? | Access to Coal Terminal |
MC410R | Ravenstruther, Down Main | Up | 1989? | Distant for MC410 |
MH705 | Allanton Loop | Up | 2005 | |
MH706 | Allanton Loop | Down | 2005 | |
GPD133 | Dunrod Loop (Wemyss Bay branch) | Down | 1967 | Originally P133 |
GPH523 | Hunterston, Low Level Loop | Down | 1978 | Adjacent to Largs Branch |
GPK222 | Kilwinning, Up Goods Loop | Up | 1986 | |
PE148 | Elderslie Passenger Loop | Up | 1985 | Removed Nov. 2009 |
YC638 | Craigendoran, West Highland Loop | Up | 1984 | |
YC639 | Craigendoran, West Highland Loop | Down | 1984 | |
YS164 | Coatbridge Sunnyside, platform 1 | Down | 1991 | Fixed red, for reversing trains |
SK6553 | Alloa Loop | Down | 2008 | Signalling Plan |
AN15 | Annan, Platform 2, Down Line | Up | 2008 | Fixed Red, for reversing trains |
LU2 | near Stewarton, Down Line (17m 75c) | Down | 2009 | Bi-directional lines. Signalling Plan |
GB5130 | Hairmyres Loop | Up | 2013 | |
GB5131 | Hairmyres Loop | Down | 2013 | |