East of the station, the tunnel widens on both sides to accommodate an additional trackway diverging from the local tracks. These bellmouths, one of which has an emergency exit, were built for a proposed extension along the BMT Jamaica Line, or for a proposed Jamaica Avenue Subway. They were not a provision for the IND Second System, as were similar structures on other IND lines, but rather date from an earlier plan for the IND Fulton Street Line, which would have connected the IND tracks west of the station to two lines to the east of the station: the BMT Jamaica Line tracks, and the BMT Fulton Street Line tracks to Lefferts Boulevard, which were eventually connected to the IND Fulton Street Line anyway, albeit past Grant Avenue.