plural of signal boost

Third-person singular simple present indicative form of signal boost

(rail transport) A railway signal controlling entry to the next section of line. Originally it meant a signal governing entry into a station.

(rail transport) Synonym of starting signal.

(rail transport) A railway signal controlling the starting of trains from a station or some other location, nowadays usually a colour-light signal. / (sports) A signal to begin a race.

plural of signal check

(rail transport) An instance where a train must stop at a red signal, or slow down before passing a signal displaying a yellow aspect.

A city in Los Angeles County, California, United States.

(rail transport) A device in the cab of a locomotive or train which displays the status of signals along the track.

(rail transport) A semaphore railway signal that is pivoted in the centre of its arm.