Perth CBD to north corridor capacity

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Perth CBD to north corridor capacity

High Priority Initiative: Perth northern corridor capacity
Potential investment options (Stage 2)
Perth, WA
Fast-growing cities
Efficient urban transport networks
Problem/Opportunity timeframe
Near term (0-5 years)
Proposed By
WA Government
Date added to the IPL
17 February 2016


Traffic congestion in the Perth metropolitan region is impacting on the efficiency of the transport network.

The 2015 Australian Infrastructure Audit projected that transport delay costs in Perth are expected to grow at an average annual rate of around 11%, from $2 billion in 2011 to $16 billion in 2031.

In the absence of additional capacity, the northern corridor is likely to become the most congested corridor in Perth, with demand expected to exceed capacity well before 2031. The Audit estimated that delay costs on the corridor, including the Mitchell Freeway, Marmion Ave/West Coast Highway and Wanneroo Road, would reach $2 billion (2011 prices) by 2031. While recent modelling scales back the projected rate of population growth in the region compared to the rate used in the Audit (reflecting the slower rate of growth in Western Australia following the mining boom) growth is still projected to average around 2.6% per year.

This growth will continue to drive increased demand for both road and public transport.

Potential options

The Western Australian Government has completed upgrades along Marmion Avenue and Wanneroo Road and is currently finalising a business case for the proposed Mitchell Freeway extension to Romeo Road.

A business case for the Yanchep Rail Extension was evaluated by Infrastructure Australia in 2018 and previously included on the Infrastructure Priority List as a High Priority Project. This project will extend the Joondalup Line from Butler to Yanchep. 

Next steps

Proponent to develop potential investment options (Stage 2 of Infrastructure Australia’s Assessment Framework), and complete business case development (Stage 3 of Infrastructure Australia’s Assessment Framework).

Individual sections are at various stages of development.