You’re referring to one of the most remarkable engineering feats in the history of the Delhi Metro — the deepest metro tunnel ever constructed in India at that time!
30 April 2009
Rajiv Chowk, New Delhi — one of the busiest interchange stations (Blue Line & Yellow Line)
Airport Express Line (also called Orange Line) – connects New Delhi Railway Station to Indira Gandhi International Airport
Tunnel Length:
1,556 meters (or 5,105 feet)
45 meters (or 147 ft 7 in.) below the ground — deepest metro tunnel in India at the time
Positioned 20–25 meters below the already existing Yellow Line tunnel at Rajiv Chowk
Construction Challenge:
Building a tunnel below an existing operational line without disrupting services above
Tunnel Method Used:
Tunnel Boring Machines (TBMs) were deployed for precision boring beneath congested urban infrastructure
Total Length: 22.7 km (14.1 mi)
Opened: February 23, 2011
Speed: Up to 120 km/h — fastest metro line in India
Travel Time: ~20 mins from New Delhi Railway Station to IGI Airport T3
New Delhi
Shivaji Stadium
Dhaula Kuan
Delhi AerocityIGI Airport (Terminal 3)
Dwarka Sector 21
Demonstrated India’s advanced urban tunneling capabilities
First time in India that a metro tunnel was built so deep and under another operational metro line
Helped establish DMRC as a global metro engineering leader.
