MRT

Noun

 * 1)  A form of heavy-rail rapid-transit system that utilizes modern Electric Multiple Units to transport commuters between stations.
 * 1)  A form of heavy-rail rapid-transit system that utilizes modern Electric Multiple Units to transport commuters between stations.
 * 1)  A form of heavy-rail rapid-transit system that utilizes modern Electric Multiple Units to transport commuters between stations.

Etymology
of

Proper noun

 * 1)   integrated mass mode (of transport); mass rapid transit;