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One red light, a stop that may be passed.
Also known as: Permissive stop signal, French single-red aspect, SNCF sémaphore signal
The French signal sémaphore, one red light, requiring a stop that may under defined conditions be passed at caution.
Requires a stop which may, under conditions defined by the operating rules, be passed at caution.
Contexts: Public information
Divides French stop signals into absolute and permissive by lamp count alone, so the number of red lights is the most consequential thing on a French lineside.
Contexts: Public information
A single lit lamp on the signal head, the second lamp of the absolute stop remaining dark.