Kathmandu. As the Nagdhunga Tunnel, viewed as a source of national pride, nears operation, a new technological era has dawned in the country.While the Siddhababa Tunnel is currently under construction, the Quality, Research and Development Center under the Department of Roads has already completed studies for 16 different tunnel projects.Why are nearly two dozen tunnels necessary in Nepal? Here are the details of a conversation with Rajesh Prasad Paudel, Director of the Quality, Research and Development Center, regarding the necessity and various dimensions of tunnel construction in Nepal:The Nagdhunga Tunnel is on the verge of operation, and 16 others have...