Sentence:  Bukit Panjang residents will soon enjoy a shorter commuting time to town when Singapore's latest <WSD>MRT</WSD> line, the Downtown Line 2 (DTL2), commences operations on Dec 27. 
Meaning of the word marked with <WSD> tags:  (mass rapid transit, mass rail transit, or metro rail transit) A form of heavy-rail rapid-transit system that utilizes modern Electric Multiple Units to transport commuters between stations.