Subways have an extensive series of fans and air shafts that circulate fresh air. The amount of circulation required is immense -- the planned ventilation system to be included in the New York City subway upgrade will move , cubic feet of fresh air every minute. All of these systems add up to a lot of moving parts, many of which are underground and relatively inaccessible.
In the next section, we'll explore what it takes to maintain a subway and keep it running. Sign up for our Newsletter! Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe. Prev NEXT.
Civil Engineering. With some 5. The subway system is usually just referred to as the "trains. The subway is never referred to as the metro, underground, or tube.
Unless noted otherwise, I mean the subway system if I just use the word train by itself. While trains mostly run underground in Manhattan, a good portion of trains run on elevated tracks in the other boroughs. With some exceptions the whole subway system operates 24 hours a day, 7 days a week. It essentially never closes, except for major incidents such as hurricanes. While the subway system is the primary mode of transportation in New York, it is not the only transportation system in the greater metropolitan area.
Other large, train-based transportation systems exist in this area that you might confuse with the New York subway include the following:. With the exception of the AirTrains, these trains are also referred to as "commuter trains" because commuters from outside New York take these to commute in and out of the city on a daily basis.
Direct current DC is used to operate trains and such auxiliary equipment as water pumps and emergency lighting. The system's electrical-power substations receive high and low-voltage electrical current from the New York Power Authority.
Substations may receive as much as 27, volts from the power plants and then convert it for use in the subway. The subway's contact third rail requires volts for operating trains. Subways can also run above ground; many subway lines run on elevated tracks at some point on their routes. At this point they are commonly referred to as the El for elevated train.
An example of this would be the number 6 subway line in New York City. In midtown Manhattan it is called the subway, but in Harlem and the Bronx it is the El, even though it is the same train in both places. Subway trains are driven by operators, or conductors, who sit in a booth at the front of the train and use a handheld device similar to a video game joystick to operate the train. There are no foot pedals on most modern subway trains, though some older model systems do have them.
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