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These Siding Arms are printed in both White Natural Versatile Plastic (previously called White Strong and Flexible - WSF) and Smooth Fine Detail Plastic (previously called Frosted Ultra Detail - FUD) and are optional signal arms for multiple arm signals on single posts.
Siding signals are shunting signals that are:
• controlled signals, operated by Signallers or other Qualified Workers, and
• used to authorise shunting movements.
The front of a semaphore shunting signal arm is red, usually with a longitudinal (along its length) white stripe. The back of the arm is white, with a longitudinal black stripe.
Multiple semaphore shunting signals are usually mounted one above the other on the same post.
The highest signal on a signal post is for the leftmost route. The next signal down is for the route immediately to the right of the first route, and so on.
If placed below running signals, small semaphore signals are subsidiary signals.
If the subsidiary shunting signal displays PROCEED, the running signal displays STOP.
Siding signals are used to control movement from sidings to main lines or vice versa, and can be used within sidings, as well as from one running line to another