The 9,2 km long Patnitop tunnel, being built at the foot of the Himalayan mountains, will connect the districts of Chenani and Nashri. It is a bidirectional tunnel with 1x1 lanes and parallel to the main tunnel has been provided an emergency tunnel. The links between the main tunnel and the emergency tunnel are made every 300 m for pedestrian access and each 1,2 kilometers for vehicles. It has a wide range of equipments, such as lighting, ventilation and ITCS devices.
Technical assistance for Operation & Maintenance and design review for MEP works: ventilation; ITCS; and lighting.