Type Highway (Proposed) | ||
 | ||
South end Reid Highway (State Route 3)
Tonkin Highway (State Route 4), Malaga North end Brand Highway (National Route 1)
Great Northern Highway (National Highway 95 / National Route 1), Muchea Major suburbs Ballajura, Ellenbrook, Bullsbrook | ||
NorthLink WA is a road construction project in Perth, Western Australia, that will see both the northern section of Tonkin Highway upgraded, and the road extended northwards as the Swan Valley Bypass, to bypass Great Northern Highway. These two component projects are separately funded, with both the state and federal governments contributing to each project. Construction commenced in June 2016 with completion expected by 2019.
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Tonkin Highway Upgrade
The federal government has allocated $140.6 million to grade-separate Tonkin Highway's intersections with Benara Road, Morley Drive and Collier Road. The funding is part of the five-year phase of the Nation Building Program from 2014–15 to 2018–19. The upgrades are intended to improve freight transportation along the highway. The total cost is expected to be $281.2 million. 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. The official policy costings did not contain specific funding for the project. However, an opposition spokesperson claimed it was "in the current forward estimates", and not in the costing, as the upgrade was neither a "new and accelerated" project, nor a project that would definitely not be funded.
Swan Valley Bypass
The proposed Perth Darwin National Highway (PDNH) Swan Valley Bypass is a planned new highway to bypass Great Northern Highway within Perth. From the junction of Reid Highway and Tonkin Highway at Malaga, it will head north towards Ellenbrook, and continue on to Great Northern Highway and Brand Highway in Muchea. The previously planned route of the PDNH, prior to 2012, followed Lord Street, east of Whiteman Park. The state and federal governments have allocated funding to the project, with construction of the central section scheduled to start in early 2017, and construction of the northern section to start in the second half of 2017. Both sections are scheduled to be complete mid 2019.
Central Section
This section starts at the Reid Highway/Tonkin Highway interchange, which is upgraded to a cloverstack interchange. North of there is the Marshal Road flyover. Then a 2 level roundabout interchange with Hepburn Avenue and Beechboro Road North. Onwards from there is the Baal Road flyover, then at the planned interchange with the Whiteman/Yanchep Highway, the highway veers northwest, Meeting up with a parclo interchange with Gnangara Road. The highway then follows the edge of Ellenbrook, having a 2 level roundabout interchange with The Promenade.
Northern Section
This section continues north from Ellenbrook, turning several local roads into cul-de-sacs. This section is eventually planned to become a four lane dual carriageway, but it is likely to be constructed as a single carriageway. The highway has roundabout interchanges with Stock Road and Neaves Road, which are unfunded and are likely to be originally constructed as a ground level roundabout. The highway then continues north, going over Muchea South Road and the railway line. The highway is to end at Brand Highway, but in the future, a roundabout interchange is to be constructed with a new Brand Highway and Great Northern Highway.