In a transit system that handles over two billion commuter trips annually, any sort of upgrade needs a lot of consideration, planning, and hard work. The transit outlets at Roosevelt Avenue and 74th Street service hundreds of thousands of commuters each day, so renovations were a bit tricky.
We helped rehabilitate two subway stations, reconstruct an adjacent bus station, and design a new building to link these facilities together into a hub of transportation. Massive columns—soaring up to 50 feet high—support the roof and steel girders of the new building, which fills a triangular space between the Interborough Rapid Transit platforms and the underground Independent Subway System.
Utilities had to stay online during construction, and so did the passenger tunnel—which needed to be widened. By using a temporary support system, the tunnel could be excavated without disrupting the 73rd street traffic above. This portion of the project widened platform space while adding an elevator and stairs—and accommodated an unusually high number of new communication and electrical services.
We also installed photovoltaic solar panels, increased the natural lighting, and optimized natural ventilation. Construction equipment used ultra-low sulfur diesel fuel, 86 percent of demolition waste was recycled, concrete was comprised of 15 percent flyash, and recyclable content steel was prefabricated for the project. All in all, this was a green solution that enhanced the New York City transit system.