Perth-based companies shortlisted by the federal and state governments to draw up plans include Leighton Contractors, Georgiou York Joint Venture, John Holland and McConnell Dowell.
Infrastructure assistant minister Jamie Briggs and WA Transport Minister Dean Nalder said construction would deliver an upgraded section of the Tonkin Highway, north of Guildford Road.
A flyover at Benara Road and new interchanges at the intersections of Collier Road and Morley Drive are included in the project.
�The Tonkin Highway provides a vital link for regional traffic movements to commercial and industrial areas such as Malaga, Kewdale, Perth Airport and the Perth CBD,� Mr Briggs said.
�The other component of NorthLink WA, the Swan Valley Bypass, will extend this route to connect with the Brand Highway and Great Northern Highway at Muchea, providing a major route to the north-west.�
The Swan Valley Bypass is the 37km link plan from the intersection of the Reid and Tonkin Highways in Malaga to the Great Northern Highway in Muchea.
Mr Nalder said the WA Day announcement was the latest in a series of NorthLink WA project milestones achieved since early 2014.
�We have been refining the project concept and technical studies to get this project to this stage, with a high level of involvement from stakeholders and community members,� he said. �By delivering infrastructure in the current competitive marketplace, we can provide better roads for motorists and greater value for taxpayer�s dollars.�