The Northern Suburbs Transit System is the name given to the project initiated and funded by the Government of Western Australia to provide high-speed passenger rail services to the northern corridor of metropolitan Perth, the capital city of Western Australia. The project was commenced by the Dowding Labor government in the late 1980s, and its main feature project was the Joondalup railway line and linked bus services, which have been a core component of the Transperth transport network since the line's opening to passengers on 21 March 1993.