when was the original tappan zee bridge built
Tappan Zee Bridge Construction started in March 1952 and the bridge opened to traffic on December 15, 1955, along with a 27-mile (43 km) long section of the New York State Thruway from Suffern to Yonkers.[18][19] New York State Governor W. Averell Harriman signed a bill on February 28, 1956, to officially name the structure the Tappan Zee Bridge.[20] In 1994, the name of Malcolm Wilson was added to the bridge's name upon the 20th anniversary of his leaving the governor's office in December 1974, though it is almost never used when the bridge is spoken about colloquially.[21]
New Tappan Zee Bridge The New Tappan Zee Bridge,[4][5] also known as the New NY Bridge[6] and officially named the Governor Mario M. Cuomo Bridge after the late former governor Mario Cuomo,[7] is a twin cable-stayed bridge being built to replace the current original Tappan Zee Bridge over New York's Hudson River. The new bridges are to the north of and roughly parallels the existing Tappan Zee Bridge, and cross the Hudson River at east-to-west direction. In the final configuration, the north span will carry the northbound traffic of I-87, westbound traffic of I-287, and a bicycle/pedestrian path, with the south span that will carry southbound and eastbound traffic of I-87 and I-287, respectively. Construction began in 2013, and at 1:36 A.M. on August 26, 2017, the north span officially opened to westbound traffic. Eastbound traffic is expected to be switched onto the same span on October 6, 2017[8] at which time the old bridge will be decommissioned and demolished. Both spans are expected to be operational by June 15, 2018.