Ahead of the upcoming Assembly elections in Delhi, the Union Cabinet has approved the Rithala–Narela–Nathupur (Kundli) corridor as part of the Delhi Metro's Phase-4 project. This new 26.5-km corridor aims to improve connectivity between Delhi and Haryana.

The project, which is set to be completed within four years, has an estimated cost of Rs 62.30 billion. The development will be managed by the Delhi Metro Rail Corporation (DMRC), a joint venture between the Government of India (GoI) and the Government of National Capital Territory of Delhi (GNCTD).

The new corridor will extend from the Shaheed Sthal (New Bus Adda)–Rithala (Red Line) and will enhance connectivity in the north-western parts of Delhi, including areas like Narela, Bawana, and parts of Rohini. It will feature 21 stations, many of which will serve previously unconnected areas of Rohini. All stations on this stretch will be elevated.

This corridor, which will link Ghaziabad in Uttar Pradesh to Nathupur in Haryana via Delhi, is expected to significantly enhance connectivity across the National Capital Region (NCR).

Phase-4 of the Delhi Metro project includes six planned corridors. Three of these were prioritized and sanctioned in 2019. The construction of these three priority corridors, covering a total of 65.2 km and 45 stations, is already underway, with over 56% of the work completed. These corridors are expected to be operational in stages by March 2026. In addition, two more corridors, covering 20.76 km , have been approved and are currently in the pre-tendering stages.

Currently, Delhi Metro operates 12 lines, spanning approximately 392 km with 288 stations across Delhi and the NCR.