Advertisement The NSW government is relying on a large developer or property owner to help deliver a key train station under Sydneyâs CBD and avoid delays to the opening of its flagship rail project between the central city and Parramatta. Internal documents marked âsensitiveâ and obtained by the Herald show that the planned CBD station presents one of the biggest challenges for the government in constructing the Metro West rail line, which is Australiaâs largest public transport project. Giant tunnels and a cavern will be dug beneath the CBD for the Metro West station. Credit:Wolter Peeters Sydney Metro, the agency responsible for the project, has been considering a partner to help deliver the CBD station and a large development above, after funding constraints imposed on Metro West prevented it from acquiring sites in the CBD for several years.