Midtown rezoning provides for one Type 1 improvement and five Type 2 improvements at this station. The Type 1 improvement would entail constructing a new street entrance on 53rd Street west of Madison Avenue. One of the Type 2 improvements would be the construction of a new staircase between the upper level platform and the mezzanine, as well as a new staircase between the upper and lower level platforms. Developers could also elect to install an elevator between the mezzanine and the two platforms. Another potential improvement would be the installation of two escalators between the upper level platform and the mezzanine. The proposed Type 2 improvements also include the construction of a new mezzanine under 53rd Street with a new fare control area to accommodate the new entrance west of Madison Avenue and a new access core. This access core would be constructed in a separate project and would provide access between the new entrance and the platforms, accommodating new staircases, an elevator and escalators. These improvements would be funded by the Extell Development Company, which is seeking permission to construct a tower of up to tall on Fifth Avenue between 46th and 47th Streets. Station layout This underground station has two levels, with the upper level serving trains bound for Lower Manhattan and the lower level serving trains bound for Queens. Each level has one track and one side platform. The upper level, built in a tube design, is below street level while the lower level is below. Staircases connect each level at both ends. There is a junction just west (railroad south) of this station that is controlled by a tower on the south end of the upper level platform. E trains continue west along 53rd Street while M trains turn south and enter the IND Sixth Avenue Line. Exits The station has two entrances/exits. The full-time exit at Fifth Avenue is at the west (railroad south) end of the platform level. Two long escalators and one staircase go up to a turnstile bank, where a token booth is present. A passageway leads to two staircases going up to the eastern corners of Fifth Avenue and 53rd Street. There is another staircase that leads to the underground shopping arcade of 660 Fifth Avenue, which has an entrance/exit on the south side of 53rd Street west of Fifth Avenue. The part-time entrance/exit leads to Madison Avenue and is