Delhi Metro Phase 4 has seen substantial progress with the introduction of new lines and extensions to accommodate the growing need for efficient urban transportation. The project, initiated with specific routes in July 2015, now encompasses significant expansions. Here’s a detailed overview of the developments:

Current Project Details:

  • Total Length: Initially set at 103.93 km, currently extended to 85.86 km after approvals.
  • Lines Involved: Six lines are designed to improve connectivity across Delhi, with major extensions and new lines introduced.

Major Components of Phase 4:

  1. Line Extensions:
    • Green Line (Line-11): Extension from Inderlok to Indraprastha, covering 12.377 km with 10 new stations.
    • Magenta Line (Line-8): Extension from Janakpuri West to R.K. Ashram spanning 28.92 km with 22 stations.
    • Pink Line (Line-7): Extension from Mukundpur to Maujpur, 12.558 km long with 10 stations.
  2. New Lines:
    • Gold Line (Line-10): From Aerocity to Tughlakabad, renamed from the Silver Line, now 23.622 km with 16 stations.
    • Gold Line Spur (Line-10): From Lajpat Nagar to Saket G-Block, an 8.385 km segment with 8 stations.

Construction and Approvals:

  • Starting Date: Civil construction began in June 2019 with significant activities like piling work starting by December 2019.
  • Approval Status: The latest corridors were approved in March 2024, with an additional 20.76 km added to the project.
  • Funding: The project is supported by both the Central and Delhi Governments, alongside a substantial loan from the Japan International Cooperation Agency (JICA).

Expected Completion and Costs:

  • Initial Deadline: December 31, 2024, for priority corridors.
  • Revised Completion: Expected by June 2026 due to extensions and new line additions.
  • Estimated Cost: Rs. 24,948.65 crore with a detailed breakdown of funding sources.

Key Features and Technologies:

  • Advanced Technology: Incorporation of systems like V2L and V2V capabilities and provisions for DC fast charging.
  • Carriage and Supply: Alstom Transport to supply 312 coaches specifically for the new phases.

Challenges and Forward Look:

  • Delayed Timelines: Adjustments in the project timeline due to extended construction phases.
  • Infrastructure Development: Emphasis on integrating new technological advancements and increasing the network’s capacity.


Delhi Metro Phase 4 is a transformative project aimed at drastically improving the connectivity and transport infrastructure within the national capital. Upon completion, it is expected to ease commuting for millions daily, supporting Delhi’s growth into a more connected urban hub.

Key Takeaways:

  • Delhi Metro Phase 4 extends over 85.86 km with new lines and extensions.
  • The project integrates advanced transportation technologies and features.
  • Expected completion has been pushed to 2026 due to extensive developments.
  • Significant investment from governmental and international sources underscores the project’s importance in urban planning and development.

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