signal box
building near a railway track that contains the controls to operate signals and points and other equipment used to regulate the movement of trains
en-US/ˈsɪɡnəl ˈbɑks/
en-GB/ˈsɪɡnəl ˈbɒks/
building near a railway track that contains the controls to operate signals and points and other equipment used to regulate the movement of trains