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A single green light meaning proceed.
Also known as: Fahrt aspect, German clear aspect
The German main signal aspect Hp 1, one green light, permitting a train to proceed at line speed.
Permits a train to proceed at the speed otherwise permitted for the line.
Contexts: Public information
Grants no speed of its own: the aspect authorises movement and the line's own limit governs how fast, which is why a separate speed indicator family exists.
Contexts: Public information
A single lit lamp on the main signal head, positioned above the lamp used for the halt aspect.