Note: text in square brackets is added for clarity and was not part of the location's name.
Opened on the Glasgow, Paisley, Kilmarnock and Ayr Railway.This was a double track junction south east of Crosshouse station. The original Glasgow - Kilmarnock line (1843) was met by the line from Irvine (1848). The location name is spelt variously Busby and Busbie. Ordnance Survey favoured the latter.
[[Busby [GPKAR] ] station was short lived, closing in 1850. Its goods yard, accessed by a headshunt reached by reversing from the Kilmarnock bound main line, remained in operation.
Busbiehead Colliery Pit No 2 opened on the south side of the junction, accessed from the Irvine line.
Crosshouse opened on the site of the earlier Busby station in 1872. A signal box, 'Crosshouse Junction', opened in 1873. This was on the north side of the junction, east of the Crosshouse station overbridge.
The box was renamed 'Crosshouse South' when a second box, 'Crosshouse North' opened at the west end of the station in 1878.
The boxes were renamed in 1885 - the north box becoming 'Crosshouse Station' and the south 'Busby Junction'.
The London, Midland and Scottish Railway (1923) renamed 'Busby Junction' to 'Crosshouse Junction' in 1924 to avoid confusion with Busby Junction in Glasgow.
Both boxes and the line to Irvine closed in 1965. The station closed in 1966.
The main line remained open until 1973, singled latterly.
After closure a single track remained in place out from Kilmarnock to Busby Junction, used for departmental use until around 1988/89.