Throgs Neck Bridge Suspended Span Deck Replacement

A New Roadway and Support Structure for a Major Artery Bridge

For the first time since it opened in 1961, the Throgs Neck Bridge, which carries more than 100,000 vehicle trips per day, will get a new roadway on the suspended span and new structural steel supports.

We are part of a joint venture developing a final design for the four-year project, which is scheduled to start construction in 2020.

Highlights

• In addition to the redecking design, we prepared load ratings to determine strengthening requirements for the floor and stiffening trusses, which included the option for a future seventh lane on the bridge.

• Other improvements include replacement of existing finger joints with modular joints, a new steel median barrier and parapets, a new fire standpipe system, and new drainage, LED roadway lighting and signage.

• Wind tunnel testing will also be performed for the proposed structure, which will include the impacts of staging and wind on trucks.

• At the towers and anchorages, a cast-in-place concrete deck is being proposed.

• Construction staging and maintenance and protection of traffic are critical to the project’s success. The recommended staging includes a five-lane scheme that provides three lanes during peak and two lanes in the non-peak direction, with the provision for a movable barrier.