and buses. Wooden elevated rolling stock had to be used by the BMT, as the Flushing Line was built to IRT clearances, and standard steel BMT subway rolling stock were not compatible. Western expansion In July 1920, the New York State Public Service Commission announced it would extend the Flushing Line two stops west to Times Square, with an intermediate station under Bryant Park. The western end of the Bryant Park station would be east of Sixth Avenue, while the eastern end would be about west of Fifth Avenue. The 42nd Street Association, a local civic group, regarded the station as very important. In May 1921, it was expected that contracts for the extension would be advertised shortly. On November 9, 1921, the New York State Transit Commission opened up the contract for the extension for bidding. The extension would take a slightly different route than the one specified in the Dual Contracts. The original proposal had the line constructed under 42nd Street to a point just to the east of Broadway, which would have forced riders transferring to the IRT Broadway–Seventh Avenue Line to walk a long distance. The Times Square station would be designed at a lower level than the two existing stations at Times Square. It would have two upper mezzanines connected by passageways: a mezzanine east of Seventh Avenue extending to Broadway, and one west of Seventh Avenue. Escalators would connect these upper mezzanines with the lower mezzanine, and a provision would be made to permit the installation of an escalator to the east of Seventh Avenue. There would be two entrances at street level at each of the western corners of 41st Street and Broadway, and two entrances at the northeastern corner of 41st Street and Seventh Avenue. On November 22, 1921, the Powers-Kennedy Contracting Corporation was awarded a contract to construct the extension on a low bid of $3,867,138, below the estimated cost of over $4 million. This low bid was the narrowest margin ever recorded for any large city contract, beating out the next highest bidder by 0.7 percent. While the contractor was provided four years to complete work, engineers expected to reduce the time needed to do so to as little as three years. Since work on the project had to be completed underneath the foundations of several large buildings, such as theatres, and the north end of the New York Public