The lower level is on the Queens Boulevard Line and has two tracks and two side platforms, separated by a curtain wall for the majority of the station. At the northern end of the station, the curtain wall is not present and the two side platforms are in full view of each other. The northbound track of the lower level is fed by the northbound local and express tracks at 42nd Street. In the southbound direction, lower level trains may access either the Eighth Avenue local or express tracks; until 2003, they also had the option of running to the abandoned lower level of 42nd Street. The two levels are offset, with the upper level running from 50th to 52nd Streets and the lower from 49th to 51st Streets. Neither level has crossover or crossunder between directions, although level-to-level transfer in the same direction is possible.