There have been several proposals to develop an HSR line between Sydney and Canberra (via Sydney Airport and Canberra Airport) to link the cities and provide an effective second airport for Sydney. The line is proposed to continue to Melbourne, possibly via Melbourne Airport.
Several ideas have been presented to establish a high-speed rail connection between Sydney and Canberra, traversing Sydney Airport and Canberra Airport to join the cities and supply an effective auxiliary airport for Sydney. The line is envisioned to continue to Melbourne, possibly through Melbourne Airport.