The now cancelled route that the expressway would have taken from Tarban Creek Bridge to Epping Road at East Ryde
The North Western Expressway or Castlereagh Freeway was a planned freeway route in Sydney, New South Wales, Australia, intended to link the Sydney CBD to its north-western suburbs, and ultimately the F3 Freeway to Newcastle.
The route was planned as early as 1962 (even providing a proposed freeway "dotted line" in the UBD street directories of the 1970s), with the section from Fig Tree Bridge to Gladesville Bridge and the Western Distributor being the only completed sections. Work on stage one, from Ultimo to Pyrmont Bridge Road, began in 1974. 12 People were arrested during protests in Ultimo against the expressway, and the Whitlam government threatened to cut off $42 billion in road funding if the NSW government continued with construction. As a result, construction was suspended.
The Wran Government cancelled the project in 1977, as a part of a change in government policy regarding freeways.