The Long Island Rail Road (LIRR) is the oldest railroad in the country still operating under its original name. It is the busiest railroad in North America, with 90 million annual riders on 735 trains covering 11 different branches. The Port Washington Branch carries 14 million riders annually and is the third-busiest branch on the LIRR, behind the Port Jefferson Branch (19 million riders) and the Babylon Branch (18 million riders). Port Washington Branch trains converge with the main line just east of Woodside Station. The branch has been electrified since 1913 and is double-track to a point just east of Great Neck Station. The highest bridge on the railroad is the Manhasset Viaduct, which goes over Manhasset Bay. The branch has serviced the 1939 New York World's Fair and the 1964 New York World's Fair as well as the stadium of the New York Mets baseball team. The Whitestone Branch, which was abandoned in 1932, diverted from the Port Washington Branch at a point a bit east of the current Mets-Willets Point station.