It runs beneath Kings Cross from William Street to New South Head Road.
It was built in conjunction with the Eastern Suburbs railway line that has a tunnel immediately below the road tunnel at its eastern end.
[2] Two bridges were constructed at Victoria Street and Ward Avenue forming the portals.
[5] Built using the cut and cover method, it was opened on 15 December 1975 by Premier Tom Lewis.
[1][6][7] The air rights were sold in the 1980s and developed as apartments by Walker Corporation.