The Transport Construction Authority (TCA), formerly Transport Infrastructure Development Corporation (TIDC) prior to July 2010, was an agency of the Government of New South Wales that was responsible for new railway projects in the city of Sydney, Australia. On 1 November 2011 the Transport Construction Authority was subsumed into the newly-formed Transport for NSW.

Transport for NSW (TfNSW) is a New South Wales government transport and road agency established on 1 November 2011. The agency is a different entity to the New South Wales Department of Transport, a department of the New South Wales Government and the ultimate parent entity of Transport for NSW.