The proposal has been referred by Main Roads Western Australia for the assessment of Neerabup Road East and Neerabup Road West only (within the Mitchell Freeway Extension). Stage 1 (Neerabup Road East/West) project includes grade separated interchanges (including road bridges) at Neerabup Road, underpasses at Neerabup Road, and Neerabup Road upgrade from Connolly Drive to Wanneroo Road connection to freeway.