High Quality Content by WIKIPEDIA articles! Westlink M7 - formerly Western Sydney Orbital - is one of Sydney, Australia`s urban motorways and a part of Metroad 7 and the Sydney Orbital Network. It connects three Metroads: M5 at Prestons, M4 at Eastern Creek and M2 at Baulkham Hills. It opened on 16 December 2005, eight months ahead of schedule.