What happened
East Coast Railway achieved the breakthrough of the 829-metre Tunnel 41-41A between Borra Guhalu and Karakavalasa on the 189-km Kottavalasa–Koraput doubling project.
Why it matters
The ₹3,580 crore doubling project is intended to expand line capacity, improve operating efficiency and support smoother freight and passenger movement through challenging Eastern Ghats terrain.
What to watch
The next milestones are tunnel finishing, track laying, systems work and commissioning of further doubled sections.
Sources: The Financial Express; East Coast Railway reporting, verified 4 October 2026.
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