Delhi Metro System - World Class Train .

Delhi Metro is a metro system serving Delhi metropolitan area and its satellite cities of Gurgaon, Noida, Faridabad and Ghaziabad in the National Capital Region of India. Delhi Metro has been ranked second among 18 international Metro systems in terms of overall customer satisfaction in an online customer survey. According to a DMRC official, in the survey conducted among the commuters of those Metro systems by Global Metro Benchmarking Groups NOVA and CoMET, Delhi Metro along with London DLR and Bangkok were the best three performers in the Net Promoters Score (NPS) category.Delhi Metro is also the world's fifteenth largest metro system in terms of length and 12th largest in terms of number of stations