It is mostly an elevated line and has 29 stations that runs from Rithala to Shaheed Sthal with a total distance of 34.55 km.

[2] The Tis Hazari – Shahdara section of this line was the first stretch of the Delhi Metro that was constructed and commissioned.

The Tis Hazari – Shahdara section of the line was inaugurated by the then Prime Minister of India, Shri.

[10] As part of the Phase III of Delhi Metro, an eastward extension of 9.5 kilometres (5.9 mi) from Dilshad Garden to Ghaziabad ISBT (New Bus Adda) was approved by DMRC and MoHUA in January 2014.

Construction began in early 2015 and commercial operations started on 8 March 2019, thereby providing commuters another link to travel to Ghaziabad along with the Blue Line branch that connects to Kaushambi and Vaishali.