Amsteram Centraal (Asd) is the Centraal Station (Central Station) of Amsterdam. It is one of the main railway nodes of the Netherlands and is used by approximately 150,000 passengers a day, excluding transferring passengers. It is also the starting point of Amsterdam Metro lines 51, 53, and 54. The station building of Amsterdam Centraal was designed by Pierre Cuypers and A. L. van Gendt, and opened in 1889. It features a roof span of approximately 40 metres fabricated in cast iron by Andrew Handyside of Derby, England. The station is currently under reconstruction due to the construction of the North/South metro line (metro line 52).