of the Western Sydney Infrastructure Plan, of The Northern Road will be upgraded to a minimum of four lanes between The Old Northern Road at Narellan and Jamison Road at South Penrith. The project is being delivered in six stages, with the first stage at Oran Park completed in April 2018. In April 2020, The Northern Road was also realigned between Mersey Road and Eaton Road at Luddenham, to facilitate the construction of Western Sydney Airport. On 16 July 2020, The Northern Road and Bringelly Road interchange opened including a realignment of The Northern Road. On 13 December 2020, The Northern Road was realigned between Elizabeth Drive and Eaton Road was opened to traffic, bypassing Luddenham. The rest of The Northern Road upgrade was completed through 2021, with the final upgrade opened to traffic in December 2021. Future replacement As part of economic development of western Sydney, including the construction of the Western Sydney Airport at , the road was proposed to be upgraded to a grade separated motorway. The proposal, known as the M9 Outer-Western Sydney Orbital motorway, would link the M7 at with the Central Coast via , and . As part of the State Budget 2014–15, the NSW Government announced a $5.5 billion road package for Western Sydney. It includes $4.6 million for planning the M9 Motorway. The preferred corridor for the motorway was expected to be announced later in 2014 before plans are made for reserving land. The corridor is now known as Outer Sydney Orbital. See also External links The Northern Road upgrade – Transport for NSW References Sydney Metroads