Respuesta :

Elevated trains and subways improved urban transportation by transporting commuters without crowding city streets
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Answer:

   The subway and trains are urban passenger transport systems with high capacity and frequency. They are usually located on viaducts and segmented on designated lines between stations. They use as propulsion mechanism multiple electric units on the rails or use aligned rubber tires, magnetic levitation or monorail.

The Advantages are:

  • It is a fast moving transport that holds large number of users;
  • Does not pollute the environment with greenhouse gases;
  • Reduces the flow of cars, so there is not so much congestion at peak hours and emission of polluting gases;
  • It is safer than other transports;

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