Mitchell Freeway Extension

Project: Mitchell Freeway Extension
Client: Main Roads Western Australia
Contractor: Macmahon Contractors

A Design and Construction contract to provide railway and highway connection to the northern suburbs of Perth. Design and construct for urban freeway, including connections to interchanges and associated civil works.


  • 4.9km of four lane, divided urban freeway.
  • 4.0km of grade separated, principal, shared path, including connections to interchanges and existing path networks.
  • Grade separated, diamond interchange at Hodges Drive and Shenton Avenue.
  • 1.6km realignment of PTA’s northern suburbs passenger rail line.
  • Construction of a new cut and cover tunnel and decline structure to grade separate rail and freeway crossing.
  • Construction of a new, principal, shared path bridge across the freeway at Portmarnock Court.
  • Preliminary design of the future freeway extension and interchange works at Burns Beach Road.
  • Service relocations associated with the works.