Amsterdam Sloterdijk is a major railway junction situated to the west of Amsterdam Centraal station. It is at a rail-rail crossing with an additional chord (Hemboog). It is on the railway line from Amsterdam Centraal to Haarlem and the last station before the junction where the line Amsterdam Centraal-Zaandam diverges from it, and on the crossing west branch of the Amsterdam-Schiphol railway line between Schiphol and Amsterdam Centraal. The Hemboog chord connects the crossing lines, providing a direct connection between Schiphol and Zaandam. There are platforms at both crossing lines and at the Hemboog; for the latter there is a separate entrance on another side of the station square.
There is also a metro line.
The original Amsterdam Sloterdijk station was opened in 1956, this was located just south of the current station. This station was for when Sloterdijk was just a small village. From here you could travel to Haarlem. In 1983 when the current station was opened, although it was only the line to Zaandam at the time, the station was called Sloterdijk Zuid and Sloterdijk Noord. This station closed in 1985 and the line was re-routed via Sloterdijk Noord. In 1986 the Amsterdam - Schiphol line was opened. The Hemboog was opened in 2003; its platforms were opened on 14 December 2008.
At the ground level is the railway from Amsterdam to Haarlem and Zaandam, with branches to Alkmaar, Purmerend, and Hoorn; at elevated level is the railway from Amsterdam to Amsterdam Airport Schiphol (and thence to Leiden and The Hague). The booking hall is at an intermediate raised level (as too, is the station square). On the south-west side of the crossing and beside the station square runs the Hemboog chord, connecting Schiphol and Amsterdam Lelylaan to Zaandam. The platforms on the Hemboog are numbered platforms 9 and 10.