On October 17, 1949, the joint BMT/IRT operation of the Flushing Line ended, and the Flushing Line became the responsibility of the IRT. After the end of BMT/IRT dual service, the New York City Board of Transportation announced that the Flushing Line platforms would be lengthened to 11 IRT car lengths, and the BMT Astoria Line platforms extended to 10 BMT car lengths. The project, to start in 1950, would cost . The platforms were only able to fit nine 51-foot-long IRT cars, or seven 60-foot-long BMT cars beforehand.