This assessment brief outlines the Western Australian Government's proposal to upgrade sections of the Great Northern Highway between Muchea and Wubin in the Wheatbelt region. The project will involve reconstruction and realignment of selected sections of the highway, upgrading intersections, widening the seal and constructing additional passing lanes. The upgrade will mprove the efficiency, reliability and safety of the route between Perth and the north-west of Western Australia. The Western Australian Government is seeking $288.9 million in Commonwealth funding for the project.

The Office of the Infrastructure Coordinator recommended that the project be included on the Infrastructure Priority List at Threshold, with conditions.