Table of Contents Key Takeaways : Delhi Dehradun Expressway opening date: 14 April, 2026, inaugurated by Prime Minister Narendra Modi Official Name: Delhi–Saharanpur–Dehradun Economic Corridor National Highways: NH-709B, NH-307, NH-344G Length: 210–213 km | Total cost: ₹11,963–₹13,000 crore (under Bharatmala Pariyojana) Construction...