HSL-Zuid (, ), is a 125 km-long high-speed railway line in the Netherlands to the Belgian border, with a branch to Breda. Together with the Belgian HSL 4 it forms the Schiphol–Antwerp high-speed railway. Originally scheduled to be in service by 2007, the first public operations began on 7 September 2009, after a ceremony on 6 September.

The Schiphol - Antwerp High-Speed Line is a high-speed rail line connecting Schiphol Airport, 9 km southwest of Amsterdam, to Antwerp, Belgium.