In the latest update the Indian government is planning two high-speed rail corridors which will connect Hyderabad to Bengaluru and Chennai cities.

High-speed Railway Corridors
It appears that the Indian railways are planning to have high-speed rail corridors linking Hyderabad to Bengaluru and Chennai, hence reducing travel time to just over two hours.
This proposal holds a great significance as these trains will travel at 320 km/h and cut travel time by almost 10 hours.
When it comes to the distance between Hyderabad and Chennai, this route will be 705 km long.
Similarly, the other route between Hyderabad-Bengaluru will cover 626 km.
So far, the flights between Hyderabad and these cities take about 1 hour and 15 minutes.
Although, it almost takes 2-3 hours considering the airport security and travel to the city.
So, it won’t be an exaggeration to say that the high-speed trains offer a faster option.
Dedicated Tracks & Much More
Moving ahead, these corridors will enable passengers to reach Bengaluru in approximately two hours and Chennai in two hours and 20 minutes, as per the official report.
RITES Limited is presently working on a detailed project report for these rail corridors.
It includes surveys, design, and cost estimates, with a budget of Rs 33 crore.
These trains are designed to run on dedicated tracks which is similar to the Mumbai-Ahmedabad bullet train project.
These tracks will be built for speeds up to 350 km/h but will initially run at 320 km/h and these tracks would take 15 years to complete.
They are planning to build elevated tracks as they will have space for the future expansion.
This is aimed to improve on the total journey duration while offering a seamless travel experience without the usual airport formalities.
The planned Hyderabad-Chennai high-speed rail corridor will cover 705 kilometers, while the Hyderabad-Bengaluru route is expected to span 626 kilometers.
Earlier, the government-owned consultancy firm RITES Limited has issued the tenders as they will be conducting a final location survey.
In this survey, they will be preparing a detailed project report (DPR), designing the alignment, estimating overall costs, and assessing projected passenger traffic.
So far the estimated cost for this survey and assessment stands at Rs 33 crore.
According to a senior official from South Central Railway (SCR), “the survey and assessment phase requires an estimated Rs 33 crore. Unlike traditional railway tracks, these corridors will be exclusively developed for high-speed rail services. The design concept follows the approach used for the Mumbai-Ahmedabad high-speed corridor, which has been dedicated solely to bullet train operations.”