The Ministry of Railways will go ahead with a plan for the development of four new high-speed rail corridors under the National Rail Plan in 2022 to connect more cities like Guwahati, Jammu and Patna with other metros through high-speed rail connectivity. As of now, the railways ministry is already operating on eight bullet train corridors, comprising the first between Mumbai and Ahmedabad. The 618 km-long Hyderabad - Bangalore, 855 km -long Nagpur - Varanasi, 850 km long Patna-Guwahati and 190 km long Amritsar-Pathankot-Jammu high-speed rail corridors are expected to be planned under the National Rail Plan in 2022. The railway ministry is considering linking all main cities of the nation with high-speed rail connectivity. The sanctioned and planned high-speed rail corridors will run along the expressways and National Highways with beautiful greenery on either side of the railway tracks. Work on the nation's first Mumbai-Ahmedabad high-speed bullet train corridor, including a distance of 508.17-km to link Mumbai with Ahmedabad, is in progress at the estimated cost of Rs. 1.1 lakh crore. The National High-Speed Rail Corporation Limited (NHSRCL) has made the DPR of the nation's first bullet train project from Mumbai to Ahmedabad. The total number of high-speed rail corridors will improve from 8 to 12 after a proposal for the four new corridors is moved in 2022. Image Source Also read: Ministry of Railways invites DPR for seven bullet train projects