Elattuvalapil Sreedharan is an Indian engineer and politician from the Indian state of Kerala. He is credited with changing the face of public transport in India with his leadership in building the Konkan Railway and the Delhi Metro while he served as the managing director of Delhi Metro Rail Corporation (DMRC) between 1995 and 2012. Known as the Metro Man, he was awarded the Padma Shri by the Government of India in 2001, the Padma Vibhushan in 2008, the Chevalier de la Legion of Honour in 2005 by the Government of France and was named one of Asia's Heroes by Time magazine in 2003. Sreedharan was appointed by the former UN Secretary General Ban Ki-moon to serve on the United Nations's High Level Advisory Group on Sustainable Transport (HLAG-ST) for a period of three years in 2015. He is a member of Mata Vaishno Devi Shrine Board. He briefly served as a national executive council member of Bharatiya Janata Party, but later quit active politics in December 2021. He also worked as an advisor of Dhaka Metro authority which is called Dhaka Mass Transit Company Limited under the Railway Ministry of Bangladesh.

The Delhi Metro is a mass rapid transit system which serves Delhi and its adjoining satellite cities, such as Ghaziabad, Faridabad, Gurugram, Noida and Bahadurgarh, in the National Capital Region of India. The system consists of 10 colour-coded lines serving 256 stations, with a total length of 350.42 kilometres (217.74 mi). It is India's largest and busiest metro rail system and the second-oldest, after the Kolkata Metro. The metro has a mix of underground, at-grade, and elevated stations using broad-gauge and standard-gauge tracks. The metro makes over 4,300 trips daily.