A very early video promoting the proposal to link Kingsford Smith Airport with the CBD, which was to eventuate with the construction of the New Southern Railway in the late 1990s. Two concepts are proposed, one of which was to utilise the existing freight line & one that was to tunnel under Mascot. Particular reference is made in the video, that the financing of the project is to be undertaken by the private sector (which was a new development in Australia at that time, similar to how Sydney's motorways were funded at that time also).