Westlink M7 - formerly Western Sydney Orbital - is one of Sydney, Australia's urban motorways and a part of the Sydney Orbital Network. It is a tolled motorway that is operated by Transurban and connects three motorways: M5 South Western Motorway at Prestons, M4 Western Motorway at Eastern Creek and M2 Hills Motorway at Baulkham Hills. It opened on 16 December 2005, eight months ahead of schedule.