Which Is Better Third Rail or Overhead?

As a solid composite rail running along the track, a third rail is more rugged than an overhead contact wire and has a longer life expectancy. ... A study performed for Dubai Metro found that a 1.5kV dc third rail traction system can also cost up to 13% less than a 750V dc third rail system.

How powerful is the third rail?

The third rail is probably one of the most difficult dangers to see. It looks just like an ordinary rail, but it carries 750 volts – easily enough to kill you. The DC current that flows through is three times as powerful as your home electricity.

What is the purpose of a third rail?

Third-rail systems are a means of providing electric traction power to trains using an additional rail (called a "conductor rail") for the purpose. On most systems, the conductor rail is placed on the sleeper ends outside the running rails, but in some systems a central conductor rail is used.