This signal box was north west of Motherwell Junction station (closed 1885) and south east of Motherwell station. It was on the main line and on the south/west side of the line just south of the Merry Street overbridge.
The box was replaced in 1920 (the new box being a little to the south east and between the goods yard lines and main line).
The box was closed in 1968. The goods yard was closed.