This line was built as a part of the Dual Contracts. 2 and 3 trains kept on switching their southern terminals until July 10, 1983, when the 2 was sent to Flatbush Avenue and the 3 to New Lots Avenue, which remains the current service pattern. The purpose of this switch was so that the 3 would readily have access to the shops at Livonia Yard. 4 trains were added on December 20, 1946, and 5 trains were gradually added between 1938 and 1950.
Branching off from the IRT Eastern Parkway Line and emerging from a tunnel on the southeast corner along the eastern edge of Lincoln Terrace Park, the IRT New Lots Line crosses a bridge over East New York Avenue and then runs over 98th Street with only one station, until it approaches the intersection with Livonia Avenue, where the line moves over that road, and remains as such almost entirely. Right after Junius Street Station, Livonia Avenue is bisected by the Long Island Rail RoadBay Ridge Branch as well as the Linden Shops, both of which run between Junius Street and Van Sinderin Avenue, the latter of which if flanked by the BMT Canarsie Line, also an elevated line, but runs underneath the New Lots Line. The last station on the line is New Lots Avenue, which is actually two blocks west of the eastern terminus of Livonia Avenue at the street the station is named for. The New Lots Line crosses over New Lots Avenue and then Elton Street, curving to the south and terminating within the Livonia Yard.
^In a 1981 list of "most deteriorated subway stations", the MTA listed Borough Hall and Court Street stations as part of the New Lots Line: New York Times, Agency Lists Its 69 Most Deteriorated Subway Stations, June 11, 1981, section B, page 5
Note that this is a list of New York City Subway lines, which are the physical infrastructure over which services operate.
Lines with colors next to them are trunk lines; trunk lines determine the color of New York City Subway service bullets, except for shuttles, which are dark gray.
Stations and line segments in italics are closed or demolished. Track connections to other lines' terminals are displayed in brackets. Struck through passenger track connections are closed or unused in regular service.