鉄道信号機 腕木式信号機
A device erected beside [[railroad tracks]] to convey information relating to the state of the line ahead to train drivers. May include "semaphore signals":http://en.wikipedia.org/wiki/Railway_semaphore_signal as well as colored lights similar to [[traffic light]]s.

For lights, "crossbucks":http://en.wikipedia.org/wiki/Crossbuck and other signals directed at pedestrians or motorists, use [[railroad crossing]].

h4. Examples

* !asset #23054515: Semaphore signal
* !asset #23054536: Electric signal

h4. See also

* [[Railroad crossing]]
* [[Railroad tracks]]
* [[train]]
railroad signal