At 48th Street, the FDR Drive emerges from the United Nations tunnel. A northbound ramp from First Avenue merges onto the northbound roadway. The southbound roadway contains two exits: exit 10 at 49th Street, and exit 11 at 53rd Street. At 54th Street, the road enters the Sutton Place Tunnel, which passes under apartment buildings on the east side of Sutton Place and York Avenue until 60th Street. In this tunnel, the southbound roadway is raised and runs over the northbound roadway for northbound access to and from the Queensboro Bridge interchange (exit 12). As part of the design in this area, numerous homes on the river were demolished and rebuilt or otherwise modified to accommodate the highway. At 63rd Street, the southbound lanes descend to ground level, at the same elevation as the northbound lanes.