Here are 13 amazing facts about Delhi metro you might not have known!

The deepest point of Delhi Metro is below the Rajiv Chowk metro station. A 45-metre deep tunnel was constructed for the Airport Express Link below the Rajiv Chowk Metro station on Jahangirpuri - Huda City Centre corridor.

Delhi Metro uses regenerative braking systems that save 35% electricity.

The escalators at all the Delhi metro stations are provided with unique 'sari guard' features on both side to avoid a sudden accident.

The highest point of Delhi metro is 23.6 meters on the Pink Line at Dhaula Kuan.

The name of Rajiv Chowk metro station is not named after Rajiv Gandhi but Rajiv Goswami, a political activist student who protested against the Mandal Commission.

The first extradosed bridge (cable-stayed bridge) in the country was made by DMRC. It is between Indraprastha and Pragati Maidan on the blue line Metro.

In 2014, the Delhi Metro created a new record. It ranked as the 2nd most popular Metro in the world. The first was New York, according to a global survey.

DMRC has deployed around 291 feeder buses on 42 routes connecting 54 metro stations in Delhi. On a daily basis around two lakh people use the feeder bus service.

At some metro stations in Delhi, you can get a bicycle for just Rs 10 for 4 hours. All you need is a valid id proof.

The male announcer in Delhi Metro is Shammi Narang and the female announcer is Rini Simon

DMRC also runs an NGO Salaam Balak Trust for orphans. Its aim is to help street children.

On 4 August 2014, Delhi Metro carried maximum passengers on a single day. Over twenty-seven million passengers took the Metro that day.

The Delhi Metro is punctual 99.7% of the time.