Blue line of Metro Rail to be upgraded to save energy and run trains at shorter intervals

An upgrade of the third rail in a stretch of the north-south or Blue line of Metro Rail, one of the oldest corridors, to save energy and equip itself to run trains at shorter intervals, completed its first breakthrough on Sunday.
A 70m section that covers Central station saw the steel third rail replaced with aluminium.
The third rail provides power to the trains. The existing third rail, made of steel, is being replaced with one made of aluminium, in phases.
“Aluminium is a much better electricity conductor than steel. Aluminium third rail will reduce the system voltage drops and subsequent energy losses. Fewer voltage drops will help in achieving faster acceleration of trains,” said a Metro official.

Source: The Telegraph