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A yellow-faced signal with a fishtail-notched arm or a yellow aspect only.
Also known as: Fishtail signal, Warning signal, Notched arm signal, Distant arm
A distant signal can never mean stop — it only ever says whether the stop signal ahead is clear. A driver passing a distant at caution is expected to continue and be prepared to stop, which is why it cannot show red.
Warns of the state of the stop signal ahead and never itself commands a stop.
Contexts: Public information
Is identified by a fishtail-notched arm in mechanical signalling and by having no red aspect in colour-light signalling.
Contexts: Public information
Is passed at caution as a matter of routine, unlike a stop signal at danger, which is a serious operating irregularity.
Contexts: Public information
A signal arm with a V-shaped notch cut into its outer end, painted yellow with a black chevron, or a colour-light head lacking a red lamp.