In 1953, with increased ridership on the line, a "super-express" service was instituted on the line. The next year, the trains were lengthened to nine cars each. Subsequently, the trains were extended to ten cars on November 1, 1962. With the 1964–1965 World's Fair in Flushing Meadows–Corona Park in April 1964, trains were lengthened to eleven cars. The Flushing Line received 430 new R33S and R36 cars for this enhanced service.