Second Harbour Crossing may refer to:

• Second Harbour Crossing, Auckland, the proposed second transport link over the Waitemata Harbour in Auckland, New Zealand.
• Upper Harbour Bridge, an existing twin motorway bridge over the Waitemata Harbour in Auckland, New Zealand.
• The Twin Sails Bridge, a proposed double-leaved bascule bridge in Poole, Dorset, England.
• The Sydney Harbour Tunnel, an existing twin-tube road tunnel crossing of Sydney Harbour in New South Wales, Australia.
• A proposed extension of the Westconnex motorway over the Sydney Harbour in New South Wales, Australia.
• Sydney Metro City & Southwest, a metro rail line under construction beneath Sydney Harbour in New South Wales, Australia.
• Eastern Harbour Crossing, an existing twin-tube road tunnel crossing of Victoria Harbour in Hong Kong.

• Harbour Crossing (disambiguation)

This disambiguation page lists articles associated with the title Second Harbour Crossing.
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