https://www.flightsguard.com/blogs/all-about-hyderabad-to-chennai-high-speed-rail-corridor-2025 The Hyderabad to Chennai route will be 705 km long. The trains will take just about 2 hours to reach Bengaluru, which is about 1 hour 15 minutes, and Chennai, which is about 1 hour 20 minutes. This will trim the travel time by nearly 10 hours compared to the current train journeys. The Trains will travel at speeds of 320 km/h or on elevated tracks. Following the creation of the Mumbai-Ahmedabad bullet train. This Hyderabad To Chennai High Speed Rail Corridor will be 705 km long, and the Hyderabad-Bengaluru path will span 626 km. Currently, the project is in the survey stage and is expected to be completed in 15 years.