The HSL 4 (Dutch: Hogesnelheidslijn 4, English: High-Speed Line 4) is a Belgian high-speed rail line part of the 87 kilometres (54 mi) axis which connects Antwerp to the Dutch border. It is 40 kilometres (25 mi); 36 kilometres (22 mi) of it being dedicated high speed tracks. It was scheduled for completion by 2005 and opened in 2009.
