Blue Line (Delhi Metro)

The Blue Line (Line 3 & Line 4) is a rapid transit metro line of the Delhi Metro in Delhi, India. Predominantly elevated, it consists of a Main Line(Line 3) with 50 stations from Noida Electronic City to Dwarka Sector 21, spanning a length of 56.11 kilometres (34.87 miles), and a Branch Line(Line 4) consisting of eight stations from Vaishali to Yamuna Bank, with a length of 8.51 kilometres (5.29 miles).

The Main Line (Line 3) held the title of the longest line in the Delhi Metro network until August 6, 2021, when the inauguration of the unfinished section between Shree Ram Mandir Mayur Vihar and Trilokpuri - Sanjay Lake stations on the Pink Line extended it to a 59 km (36.66 mi)-long corridor, surpassing Line 3.