The Signalling Record Society
ELR to RailRef Correlation - ELR Codes X
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Signal Fact 11
If the Ball can be seen, the line is right for the train to go in.
If the Ball is not visible, the train must not pass it.
Early Great Western Railway Instruction to Drivers.
|XRC||Crossrail Central Section|
|XRS||Crossrail South Section|
|XTD||yes||Charing Cross - Dover Western Docks||SE001