Second Harbour Crossing may refer to: The Upper Harbour Bridge, an existing twin motorway bridge over the Waitemata Harbour in Auckland, New Zealand. Second Harbour Crossing, Auckland, a proposed second transport link over the Waitematā Harbour in Auckland, New Zealand. The Sydney Harbour Tunnel, an existing twin-tube road tunnel crossing of Sydney Harbour in New South Wales, Australia. The Western Harbour Tunnel, an under-construction extension of the M8 Motorway beneath Sydney Harbour in New South Wales, Australia. Sydney Metro City & Southwest, a rapid transit rail line that extends the Metro North West & Bankstown Line beneath Sydney Harbour in New South Wales, Australia. The Eastern Harbour Crossing, a twin-tube road tunnel crossing of Victoria Harbour in Hong Kong. The Twin Sails Bridge, a double-leaved bascule bridge in Poole, Dorset, England.
See also Harbour Crossing (disambiguation)