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These shunting signal arms have been made available to assist in signalling sidings and nearby trackage for shunting.
These 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.
Shunting signals 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.
Calling On Signals
• are fitted as subsidiary signals to home signals, and
• authorise a movement past the running signal, and
• indicate that the points in the route are locked, but do not indicate that the line ahead is clear.
Shunt Ahead signals
• are fitted as subsidiary signals to starting signals or home/starting signals, and
• authorise a shunting movement past that signal and within the section only.
Shunt ahead signals must not be used as an authority to proceed through a section.
Wrong Road Signals
Wrong road signals authorise shunting movements to the limit of authority in the wrong running-direction.