Metro is the latest edition in Delhi transport service but is soon turning out to be the most preferred mode. Clean, reasonable, fast and hygienic are some of the factors that are making Delhi Metro the best in the lot. Delhi Metro has already linked many parts of Delhi with its network of trains and with many projects meant to be completed before Commonwealth Games traveling in Delhi would be far easier. It is a combination of underground, at-grade and elevated lines and carries millions of commuters each day. The line linking Noida to the main city is the latest addition to the Delhi metro.