The IRT Eastern Parkway Line is one of the lines of the A Division of the New York City Subway. Built for the Interborough Rapid Transit Company (IRT), it stretches from Downtown Brooklyn south along Flatbush Avenue and east along Eastern Parkway to Crown Heights. After passing Utica Avenue, the line rises onto an elevated structure and becomes the New Lots Line to the end at New Lots Avenue in East New York, Brooklyn. The west end of the Eastern Parkway Line is at the Joralemon Street Tunnel under the East River.