construction contract was awarded on March 7, 2019, with an estimated completion date of March 2022. The new platforms were opened on September 7, 2021. A new mezzanine below the existing mezzanine provides a direct connection from the subway station to the Grand Central Terminal's lower-level Metro-North platforms, and to the concourse of the Long Island Rail Road's Grand Central Madison station, the latter of which was built as part of the East Side Access project. This will replace the current escalators from the existing mezzanine directly to the Flushing Line platforms, and is estimated to cost $75–150 million. The connection to the LIRR station opened on January 25, 2023. Further circulation improvements are planned as part of a replacement of the Hyatt with a skyscraper at 175 Park Avenue, to be called Project Commodore, which is expected to be built from 2022 to 2030. As part of the project, the subway turnstiles in the basement of the Hyatt would be moved to the ground floor of Project Commodore. The 42nd Street Passage from the street to Grand Central's Main Concourse, within the Hyatt's ground level, would be expanded by . As part of the construction of the Second Avenue Subway, a transfer might be included between here and the 42nd Street station on that line. This would provide a transfer to the T train, which is proposed to serve Phase 3 of the Second Avenue Subway (which is currently not funded or scheduled). Currently, the transfer is under evaluation. The 900-foot long transfer passageway would run under 42nd Street between Second Avenue and Third Avenue, connecting to the IRT Flushing Line platform. Up to four properties might need to be required for the necessary ancillaries and emergency exits to built. The passageway would run under the northern side of 42nd Street, and the exit at the eastern end would be on the northwestern corner of that street and Second Avenue. Failed terrorist plot Najibullah Zazi and alleged co-conspirators were arrested in September 2009 as part of an al-Qaeda Islamist plan to engage in suicide bombings on trains in the New York City subway system, including near the Grand Central station and the Times Square–42nd Street/Port Authority Bus Terminal station during rush hour that month, and Zazi has pleaded guilty. Station layout There is a mezzanine above the Lexington Avenue Line's platforms, which have numerous exits to and from Grand