A New New York Tappan Zee Bridge
Tappan Zee Cable Stay Bridge
A New New York Tappan Zee Bridge ; the bridge was designed and built by Tappan Zee Constructors (TZC), a consortium of design, engineering and construction firms, including Fluor, American Bridge, Granite Construction and Traylor Bros., along with HDR, Buckland & Taylor, URS, VSL and GZA. A $3.98 billion bridge is one of the largest single design-build contracts for a transportation project in the United States and the largest bridge in New York state history.
Located less than 20 miles north of New York City, the new 3.1-mile state-of-the-art, twin-span, cable-stayed bridge crosses one of the widest parts of the river. Replacing the Governor Malcolm Wilson Tappan Zee Bridge, the final span of the new bridge opened to drivers on Sept. 8, 2018.
Design Features of the Tappan Zee Bridge
Each span of the new bridge carries four lanes of traffic as well as space for disabled vehicles, emergency responders and buses. The new twin-span crossing also is mass-transit ready—designed to accommodate future commuter rail—and features a state-of-the-art traffic-monitoring system. There also will be a shared-use path for bicyclists and pedestrians.
Original Tappan Zee Bridge, a beautiful and iconic structure in itself, outlived its useful life. The bridge opened to traffic in 1955 and, until its retirement on Oct. 6, 2017, was a vital artery for residents, commuters, travelers and commercial traffic.
New bridge is a visually striking, recognizable landmark, and one of the widest cable-stayed structures of its kind in the world. Cable-stayed refers to a type of bridge where the deck is supported by straight cables attached to the top of towers. The towers are built first, and then deck sections and stays are attached progressively.
Cable-stayed main span is supported by eight 419-foot towers, which stand at five-degree angles and feature a sleek, chamfered design. The angled design was selected by the project’s Visual Quality Panel, which was comprised primarily of Rockland and Westchester residents. Outward incline of the towers creates a unique look and eliminates the need for an upper transverse tower strut—a structural element typical between two towers—adding to an open-air experience while crossing the bridge.