Blue Line (Delhi Metro)

The Blue Line (Line 3 & Line 4) is a metro rail line of the Delhi Metro, a rapid transit system in Delhi, India.Mostly elevated, it is the longest line (by total length) of the network and consists of a Main Line (Line 3) with 50 stations from Noida Electronic City to Dwarka Sector 21, with a length of 56.11 km and a Branch Line (Line 4) consisting of 8 stations from Vaishali to Yamuna Bank, with a length of 8.51 km.

The Main line (Line 3) was the longest line of the Delhi Metro network until 6 August 2021, when an unfinished section between Mayur Vihar Pocket 1 and Trilokpuri Sanjay Lake stations on the Pink Line was inaugurated, becoming one 59-km-long corridor.

History
The Dwarka – Barakhamba Road section of the line was inaugurated and opened to the public by the then Prime Minister of India, Dr. Manmohan Singh, on 31 December 2005. Subsequent sections opened between Dwarka – Dwarka Sector 9 on 1 April 2006, Barakhamba Road – Indraprastha on 11 November 2006, Indraprastha – Yamuna Bank on 10 May 2009, Yamuna Bank – Noida City Centre on 12 November 2009, and Dwarka Sector 9 – Dwarka Sector 21 on 30 October 2010.

A branch of the Blue line with a length of 6.25 km was inaugurated on 8 January 2010 from Yamuna Bank metro station up to the Anand Vihar in East Delhi. It was further extended up to Vaishali, with it opening to public on 14 July 2011. On 9 March 2019, a 6.67 km extension of the line from Noida City Centre to Noida Electronic City was opened for public by Prime Minister Narendra Modi.

Phase IV
The main line has been proposed to be extended from Noida Electronic City to Sahibabad with 5 stations at Vaibhav Khand, DPS Indirapuram, Shakti Khand, Vasundhara Sector 5 and Sahibabad.

Stations
Karkardooma station on the Vaishali branch is the second highest station of Delhi metro with a platform height of 20 m. Rajouri Garden station on the main line is the third highest station with a height of 17 m.

Line 3 - Main Line
Delhi Metro currently has parking facilities at 35 metro stations of the Blue line.