M12 Motorway (Sydney)

M12 Motorway

New South Wales
M12 Motorway; New South Wales
	The M12 Motorway under-construction, January 2025
General information
Type	Motorway
Length	15 km (9.3 mi)
Opened	14 March 2026
Route number(s)	M12
Major junctions
East end	Westlink M7 (M7); Cecil Park, Sydney;
West end	The Northern Road (A9); Luddenham, Sydney;
Location(s)
Major suburbs / towns	Cecil Park, Cecil Hills, Mount Vernon, Kemps Creek, Badgerys Creek, Luddenham
Highway system
	Highways in Australia; National Highway • Freeways in Australia; Highways in New South Wales; ; ;
	---- Infobox instructions; guidelines; examples; talk;

The M12 Motorway, initially known as Western Sydney Airport Motorway, is a toll-free east-west motorway in Sydney, Australia, linking the Westlink M7 motorway and The Northern Road, as part of the Western Sydney Infrastructure Plan. The four-lane motorway is 15 kilometres (9.3 mi) long and was built at a cost of $1.75 billion (with both state and federal funding). It is aimed at providing direct access from the M7 Westlink motorway to the new Western Sydney International Airport situated at Badgerys Creek.

The motorway began construction in August 2022 and opened on 14 March 2026, months prior to the Western Sydney Airport opening in late 2026. However, the M7–M12 interchange will open later in the year.