Railways Plans Four-Lane Expansion of 7 High-Density Corridors
Work underway on around 11,000 km of high-density routes to meet rising passenger and freight demand
August 27, 2026 — Indian government is working towards expanding the capacity on seven key rail routes in the country that are among the busiest and carry heavy traffic. According to the Union Railway Minister Ashwini Vaishnaw, work is underway to convert around 11,000 km of these seven high-density rail routes into four-lane corridors. “Under the leadership of Prime Minister Shri Narendra Modi Ji, the four-laning of these key routes is part of a larger effort to build a railway network with greater capacity, lower transport costs and cleaner mobility,” the Minister said on August 26.
Work is ongoing at some locations, while Detailed Project Reports (DPRs) have already been prepared for the remaining routes.
The key rail corridors are Delhi–Howrah, Howrah–Chennai, Chennai–Mumbai, Mumbai–Delhi, Delhi–Chennai, Mumbai–Howrah and Delhi–Guwahati. Although these routes account for only around 16% of the total railway network, they carry nearly 41% of the country’s total rail traffic connecting major metropolitan cities, industrial areas and commercial centres across the country.
At present, the Delhi–Prayagraj route, Vadodara–Mumbai corridor, Howrah–Bilaspur section and the main lines near Chennai already have four-lane capacity.
