The Centre has begun assessing the viability of seven high-speed rail corridors announced in the Union Budget 2026–27, to be executed by NHSRCL. Covering about 4,000 km at an estimated ₹16 trillion, they are Mumbai–Pune, Pune–Hyderabad, Hyderabad–Bengaluru, Hyderabad–Chennai, Chennai–Bengaluru, Delhi–Varanasi and Varanasi–Siliguri. India's first bullet train line, Mumbai–Ahmedabad, is under construction.