Expansion Redefines Network Scale
Magenta Line Emerges as Delhi Metro’s Longest Corridor: The Magenta Line (Line-8) of the Delhi Metro Rail Corporation (DMRC) is set to become the longest corridor in the network after the completion of Phase IV and newly sanctioned Phase V (A) projects. The latest approval extends the line from Ramakrishna Ashram Marg to Indraprastha via Central Vista.
The Indraprastha–Inderlok stretch under Phase IV will operate as a continuation of the Magenta Line. Once fully operational, the corridor will run from Botanical Garden (Noida) to Inderlok (Delhi), covering nearly 89 kilometres.
Static GK fact: The Delhi Metro began operations in 2002, and it is one of the largest metro networks in India after the Mumbai Metro in terms of expansion pace.
Longest and Fully Automated Corridor
With the completion of all extensions, the total stretch will reach around 89 km, making it the longest single corridor in the Delhi Metro network. The entire line is planned to function as a driverless Metro corridor using Communication-Based Train Control (CBTC) technology.
CBTC enables real-time communication between trains and control centres, ensuring safety and reduced headway. Delhi Metro has already introduced driverless operations on select sections under Grade of Automation (GoA) 4, which allows unattended train operations.
Static GK Tip: India’s first driverless Metro operations were launched in Delhi in 2020 on the Magenta Line section.
Record Number of Interchange Stations
After expansion, the Magenta Line will have 21 interchange stations, the highest in the network. At present, the operational stretch includes four interchange stations — Kalkaji Mandir, Botanical Garden, Janakpuri West, and Hauz Khas.
An additional 17 interchange stations will be added under Phase IV and Phase V (A). Key upcoming interchanges include Kalindi Kunj, Terminal-1 IGI Airport, Azadpur, Central Secretariat, New Delhi, and Inderlok.
Notably, Central Secretariat, Azadpur, New Delhi, and Inderlok will become triple interchange hubs, connecting three separate metro lines. This will significantly reduce cross-city travel time and enhance multimodal integration.
Static GK fact: Central Secretariat connects the Yellow and Violet Lines and serves as a major administrative zone station near Parliament.
Engineering Benchmarks and Underground Reach
The completed corridor will feature 65 stations, out of which 40 will be underground, making it one of the most tunnel-intensive corridors in the network.
The Magenta Line hosts two major engineering landmarks. Haiderpur Badli Mor is the highest elevated Metro station with a rail level height of about 28.36 metres. Meanwhile, Hauz Khas is among the deepest Metro stations in India, located nearly 29 metres below ground level.
These features highlight advanced urban tunnelling and elevated structure engineering capabilities developed under Delhi Metro expansion phases.
Urban Mobility Impact
The expanded corridor is expected to ease congestion across Delhi NCR, integrate high-density zones, and provide seamless end-to-end connectivity. With enhanced interchange options and driverless automation, the Magenta Line will strengthen Delhi’s mass rapid transit backbone.
The project aligns with India’s broader urban mobility mission promoting sustainable, energy-efficient public transport systems.
Static Usthadian Current Affairs Table
Magenta Line Emerges as Delhi Metro’s Longest Corridor:
| Topic | Detail |
| Corridor Name | Magenta Line (Line-8) |
| Total Length After Expansion | Approximately 89 km |
| Start and End Points | Botanical Garden to Inderlok |
| Total Stations | 65 stations |
| Underground Stations | 40 stations |
| Interchange Stations | 21 stations |
| Deepest Station | Hauz Khas (about 29 metres) |
| Highest Station | Haiderpur Badli Mor (28.36 metres) |
| Automation Technology | Communication-Based Train Control (CBTC) |
| Expansion Phases | Phase IV and Phase V (A) |
