Delhi Metro Rail Corporation (DMRC) has encountered a setback in the expansion of Delhi's Metro network as the deadlines for three corridors under Phase-IV have been revised. The Phase-IV project aims to add 65.20 km of new lines and 46 metro stations across the national capital, with 28 km underground and the rest elevated. This expansion includes the Janakpuri West-RK Ashram Marg, Majlis Park-Maujpur, and Tughalakabad-Aerocity corridors., Delhi News, Times Now