High Speed Rail Corridors
Six corridors on Diamond Quadrilateral connecting metropolitan cities and growth centres of the country have been identified for the feasibility study for high-speed rail connectivity

At present, Mumbai-Ahmedabad Rail corridor is the only sanctioned High-Speed Rail Project in the country and implemented with the technical and financial assistance of Government of Japan. The estimated cost of the Project is INR 1,08,000 crore. The government of Japan has agreed to provide a soft loan of 81 percent of the total project cost with 0.1 percent rate of interest per annum. The time period for repayment of the loan is 50 years with 15 years grace period.
Six corridors on Diamond Quadrilateral connecting metropolitan cities and growth centres of the country (Delhi, Mumbai, Chennai & Kolkata) have been identified for the feasibility study for high-speed rail connectivity viz :
(i) Delhi-Mumbai, (ii) Mumbai-Chennai, (iii) Chennai-Kolkata, (iv) Kolkata-Delhi and both diagonals i.e. (v) Delhi-Chennai and (vi) Mumbai-Kolkata routes. As High-Speed Projects are high capital and technology-intensive sanction of High-Speed Projects is subject to its technical feasibility, financial viability and availability of resources.
(This is a reproduced press release from the government of India as it is. Devdiscourse bears no responsibility towards grammatical or factual errors that may have been presented in the report.)