'It is a complex undertaking as it involves the parallel construction of two tunnels,' Read more at: https://www.deccanherald.com/india/uttarakhand/indias-longest-rail-tunnel-completed-in-uttarakhand-3500682
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://www.deccanherald.com/india/uttarakhand/indias-longest-rail-tunnel-completed-in-uttarakhand-3500682
Rishikesh-Karnaprayag Rail: India’s Longest Tunnel Completed at 14.5 km
www.deccanherald.comRailway Milestone: India completes 14.5 km tunnel under Rishikesh-Karnaprayag rail line, boosting Uttarakhand tourism and connectivity by 2026.