High-Speed Rail Tunnel through Adelaide Hills for Passengers and Freight Proposal Video May 2022

A dual bore rail tunnel through the Adelaide Hills from Callington Station to Mitcham Station should have a gradient of 1% or less so that it can handle high speed freight trains and high speed passenger trains. Underground stations at Mt Barker, Verdun and Belair should have "express" trains passing through the middle of the stations with "local" trains on "loops" alongside the express tracks. Similar to the track on the Japanese Shinkansen rail lines. The tunnels needs to be high enough to allow double stack freight trains and for the overhead wires for the 24,000 volts AC power of the freight locomotives and passenger trains. We look a the tunnel in Portland Oregon built through a granite mountain whose gradient restricts its use to light rail that have independent power to each wheel of the vehicles. Two earlier proposals, the "Adelaide Rail Freight Movements Study Final Report. Australian Government Department of Infrastructure, Transport, Regional Development & Local Government, June 2010" and "Globelink, Scoping Study Report Business Case - Stage 1 and 2, Government of South Australia, Department of Planning Transport and Infrastructure, December 2019" restricted themselves to freight traffic.