The transfer between the IRT and BMT was placed inside fare control on July 1, 1948. In the 1960s, the New York City Transit Authority (NYCTA) started a project to lengthen station platforms on the Broadway Line to to accommodate 10-car trains. As part of the project, the Broadway Line platforms at Union Square, which were long, were extended to the north. The Broadway Line station was overhauled in the late 1970s. The MTA replaced the original wall tiles, old signs, and incandescent lighting with the 1970s wall tile band and tablet mosaics, signs and fluorescent lights. They also fixed staircases and platform edges.