William Street is a suburban distributor and one of two major cross-streets in the CBD of Perth, Western Australia. Commencing in western Mount Lawley it also crosses the Perth to Fremantle railway at the Horseshoe Bridge. It is a one-way street from Brisbane Street to Newcastle Street, from which point until its terminus at The Esplanade it has been progressively converted to two-way since 2008. Its route takes it through the Northbridge cafe and nightclub district as well as Perth's central business district. A ramp which took William Street traffic from The Esplanade onto the southbound Kwinana Freeway was closed in 2004 during the construction of the Esplanade railway station.