Most extensive underground rail system

The New York City subway system has a total track mileage of 1,355 km. (842 miles), including 299 km. (186 miles) of track in yards, shops and storage. Although the New York City metro system has a total of 1,355 km. (842 miles) of track, the actual transport routes covered by the subway measure only 370 km. (230 miles). The network serves and estimated 4.3 million passengers per day (around 1.3 billion per year). With 468 stations, it has the most stations of any underground train system. Opened on October 27, 1904 with 28 stations, most of the existing network had been completed by 1940. In addition to the 277 stations situated underground, 153 rest on elevated structures, 29 are built on embankments and nine lie in 'open cuts' (trench-like depressions below street level). During weekday rush hours 547 trains consume 495,000 kW. of power, supplied by 214 electrical sub-stations. Operating 24 hours per day, seven days per week throughout Manhattan, Queens, Brooklyn and the Bronx, trains on the system cover around 1.6 million kilometers (1 million miles) on an average weekday. SIZE=2