NorthLink WA was a road construction project in Perth, Western Australia, that saw both the northern section of Tonkin Highway upgraded, and the road extended northwards as the Swan Valley Bypass, to bypass Great Northern Highway.

[3] In the lead up to the 2013 Australian federal election, which resulted in a change a government, the Labor candidate for Perth, Alannah MacTiernan, accused the then-opposition's candidate of lying to the electorate over their commitment to the upgrade.

[5] The previously planned route of the PDNH, prior to 2012, followed Lord Street, east of Whiteman Park.

[6] The state and federal governments allocated funding to the project, with contracts for the central section awarded to the Great Northern Connect Team on 12 January 2017,[7] and contracts for the northern section awarded to CPB Contractors on 30 January 2017.

[12] This section was originally planned to be a 2 lane single carriageway with at-grade intersections, but because costs went down, it was changed so it can be constructed as a 4 lane dual carriageway with grade separated interchanges.