Problem to be addressed
Perth’s population has grown strongly over the past 20 years, particularly in the southern suburbs between the Armadale and Mandurah Lines, such as Canning Vale, Southern River, Piara Waters and Harrisdale. Residents of these areas rely on buses or cars to access nearby railway stations, or use cars for their entire journey. Some of these bus services and major interchanges are now at capacity, or forecast to reach it in coming years. This includes Murdoch, which experiences the highest volume of bus/train transfers of any suburban interchange in Perth.
The radial design of the current rail network does not allow for orbital rail trips, meaning users travel to their destinations either via the Perth CBD on the rail network, or using the road network.
To be delivered as part of the Western Australian Government’s METRONET program, the proposed Thornlie-Cockburn Link involves the construction of two new train stations (Nicholson Road Station and Ranford Road Station) and construction of a new passenger rail corridor that follows the existing Midland to Kwinana freight line. It would extend the Thornlie Line to Cockburn Central, creating an east–west link between the Mandurah Line and the Armadale Line through Jandakot, Canning Vale and Thornlie.
Economic, social and environmental value
By increasing the capacity of Perth’s metropolitan railway network, the project seeks to promote urban renewal along the line, relieve pressure on existing stations and reduce demand on roads.
The proponent’s stated benefit-cost ratio is 1.2, with a net present value of $151 million (7% real discount rate).
Capital cost of initiative as stated by proponent (2018 business case) Commercial-in-Confidence | Australian Government contribution To be determined | State government contribution To be determined | Private sector contribution N/A