Once the corridors have been completed, NHSRCL will further extend the lines to form a network of high-speed rail connectivity in India, which is also known as the Diamond Quadrilateral.

[5][6][7] The E5 series trains with red and grey livery have been chosen for use on the under-construction ₹1.08 lakh crore (US$12 billion) Mumbai–Ahmedabad high-speed rail corridor in India,[8] scheduled to open in June-July 2026.

[9][10] Hitachi and Kawasaki Heavy Industries started talks with Indian Railways on design changes such as the modification of the air conditioning system in order for it to operate efficiently at temperatures up to 50 degrees Celsius.

[11][12] A thorough technical study was commissioned by National High Speed Rail Corporation Limited with HKC Consortium in Japan.

[13] It is the first high-speed rail corridor to be implemented in India, with technical and financial assistance from Japan, with a total of twelve stations in the states of Maharashtra, Gujarat and union territory of Dadra and Nagar Haveli.

[15] The high-speed rail corridor will cover a total of 12 stations namely Mumbai, Thane, Virar and Boisar (in Maharashtra), Vapi, Bilimora, Surat, Bharuch, Vadodara, Anand, Ahmedabad and Sabarmati (in Gujarat).