Kathmandu. In a mountainous country like Nepal, tunnels are the only viable alternative to make road transport easier, faster, and safer. By cutting through mountains instead of navigating winding roads, both travel time and fuel consumption are significantly reduced.Nepal's first modern Nagdhunga Tunnel is currently in the final stages of preparation for operation, with testing scheduled for this month. With this, Nepal is officially entering the tunnel era.However, the Nepali economy cannot support building tunnels everywhere just because the need is felt. Out of nearly a dozen and a half (mainly 16) tunnel projects studied so far, only 4 or...