The Bronx–Whitestone Bridge (colloquially referred to as the Whitestone Bridge or simply the Whitestone) is a suspension bridge in New York City that crosses the East River and connects the boroughs of Queens on Long Island, and the Bronx on the United States mainland via Interstate 678. The bridge was designed by Othmar Ammann and opened to traffic with four lanes on April 29, 1939. The Bronx–Whitestone Bridge is owned by New York City and operated by the MTA Bridges and Tunnels, an affiliate agency of the Metropolitan Transportation Authority.