The Delhi Metro, operated by the Delhi Metro Rail Corporation (DMRC), is India's largest and busiest rapid transit system. Since its first segment (Red Line) opened in 2002, it has grown to 10 lines, 242 stations, and 242.62 km (150.78 mi) of track—mix of underground, at-grade, and elevated—making it the world's eighth-longest metro network.
The Metro has reshaped Delhi's urban geography, spurred transit-oriented development, and set a benchmark for metro projects across India (e.g., Bengaluru, Chennai, Hyderabad). It remains a lifeline for millions, embodying sustainable urban transport.