Hyderabad–Bengaluru high-speed rail corridor
The Hyderabad–Bengaluru High Speed Rail Corridor is a proposed high-speed rail line connecting India's two southern metros, Hyderabad and Bengaluru. When completed, it will be South India's fastest high-speed rail line.
Source: Wikipedia — Hyderabad–Bengaluru high-speed rail corridor (CC BY-SA 4.0)