Sunnyside Yard. The services that run along this line are named after the branches they use; trains beyond Hicksville, where the Port Jefferson Branch diverges, are known as Ronkonkoma Branch and Greenport Branch trains. The Montauk Branch runs from Long Island City east to the Montauk station, with junctions with the Main Line at Long Island City and Jamaica. It is electrified from Jamaica east to Babylon. Trains operating east of Babylon are listed as Montauk Branch service and are hauled by diesel locomotives, while trains using the line from Jamaica to Babylon are labeled as Babylon Branch trains. The portion of the line between Long Island City and Jamaica, known as the Lower Montauk Branch, no longer carries passenger trains and is used only for freight service. The electrified Atlantic Branch runs from Atlantic Terminal in Downtown Brooklyn east to Jamaica, where it meets the Main Line and the Montauk Branch, and then heads southeast to become the Long Beach Branch east of Valley Stream. East of Valley Stream, the Far Rockaway Branch turns south, while the West Hempstead Branch turns northward. The electrified Port Washington Branch, the only one that does not serve Jamaica, branches from the Main Line west of Woodside (running parallel to the Main Line until Winfield Junction, which is east of that station) and runs east to Port Washington. It only serves four stations in Nassau County. It contains the Manhasset Viaduct, which is the highest bridge on the LIRR network. The Port Jefferson Branch splits from the Main Line east of Hicksville, with electric service to Huntington and diesel service to Port Jefferson. Until 1938, it continued east to Wading River. The electrified Hempstead Branch splits from the Main Line east of Queens Village (running parallel to the Main Line until just after Floral Park) and runs east to Hempstead. At Garden City, the Garden City-Mitchel Field Secondary curves off and goes to Mitchel Field. The electrified West Hempstead Branch splits from the Montauk Branch east of the Valley Stream station and runs northeast to West Hempstead, originally continuing to junctions with the Hempstead Branch and the Oyster Bay Branch at the Main Line. The Oyster Bay Branch splits from the Main Line east of Mineola and heads north and east to Oyster Bay. The first section to East Williston is electrified; only diesel trains run along the majority of the line to