The first major upgrade to the Brooklyn Bridge commenced in 1948, when a contract for redesigning the roadways were awarded to David B. Steinman. The renovation was expected to double the capacity of the bridge's roadways to nearly 6,000 cars per hour, at a projected cost of $7 million. The renovation included the demolition of both the elevated and the trolley tracks on the roadways, the removal of trusses separating the inner elevated tracks from the existing vehicle lanes and the widening of each roadway from two to three lanes, as well as the construction of a new steel-and-concrete floor. In addition, new ramps were added to Adams Street, Cadman Plaza, and the Brooklyn Queens Expressway (BQE) on the Brooklyn side, and to Park Row on the Manhattan side. The trolley tracks closed in March 1950 to allow for the widening work to occur. During the construction project, one roadway at a time was closed, allowing reduced traffic flows to cross the bridge in one direction only. The widened south roadway was completed in May 1951, followed by the north roadway in October 1953. The restoration was finished in May 1954 with the completion of the reconstructed elevated promenade.