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.

• Harbour Crossing (disambiguation)

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