The Janakpuri West metro station on the line contains India's tallest escalator with a vertical height of 15.6 metres.

[4] For the first time in India, the construction of two parallel tunnels was successfully completed concurrently at the Dabri Mor–Janakpuri South station.

[5]: 71 The line was initially scheduled for completion in December 2016, but the timeline was extended due to challenging tunnelling conditions.

The line was inaugurated in two phases: the first section, from Botanical Garden to Kalkaji Mandir, was opened to the public on December 25, 2017.

[7] A stretch of 8.679 km, comprising 9 stations on the Botanical Garden–Kalkaji Mandir section, was opened to the public on 25 December 2017.