1. At 15,800 feet, it is the highest highway tunnel in the world — nothing else is close.
2. Breakthrough came eighteen months early, a Himalayan first; the drill-and-blast automation learned at Atal and Sela did it, as our infrastructure decade ledger records.
3. It completes India's second all-weather axis to Ladakh — winter convoy capacity to the frontier roughly doubles.
4. The new alignment runs deeper from the Line of Actual Control, beyond the interdiction envelopes that shadow the old route's choke points.
5. Zanskar's fourteen thousand residents lose their five-month winter isolation: ambulances, apples and school terms use the same bore as the convoys.
6. Commissioning lands in late 2027 after fit-out — ventilation, lining, safety galleries.
7. The altitude list is now complete: Atal at 10,000 feet, Sela at 13,000, Shinkun La at 15,800. Ask why India can't build at altitude, and the BRO answers in metres above sea level. More on the defence desk.
