The M8 Motorway is a 15.2-kilometre (9.4 mi) tolled dual carriageway motorway in Sydney that is designated the M8 route marker. It consists predominantly of tunnels and includes tunnel connections to the future Western Harbour Tunnel and the M6 Motorway.

WestConnex is a 33-kilometre (21 mi) predominantly underground motorway scheme in Sydney, New South Wales, Australia. A joint project of the New South Wales and Federal governments, the motorway scheme created around 26 kilometres (16 mi) of new tunnels between Homebush and Kingsgrove, passing underneath Inner West suburbs including Haberfield and St Peters. The first of the tunnels, the M4 East, opened to traffic in July 2019. The second of the tunnels, the M8 Motorway, opened to traffic a year later in July 2020. The third of the tunnels which extend the M4 and M8 opened to traffic in January 2023. The final component of the scheme, the Rozelle Interchange, opened to traffic in November 2023.