Glossary of Terms


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2 Aspect Block
An automatic block system in which the signals can display two indications:
1) Next block section occupied.
2) Next block section clear.

Regional
Disciplines: Train Control
2 Position Signalling
Two systems of signalling are in use in Victoria, namely two position and three position.
In two position signalling a separate arm (usually on a separate post) is used to display the distant indication; and also a separate arm is provided for each possible route past that particular signal location towards the next fixed signal location. Two position signalling is therefore essentially a system of route indications and each arm applies only up to the next signal.

Regional
Disciplines: Train Control