Penetrating through high altitude mountains in difficult terrains and connecting inaccessible areas, tunnels have been one of the main features in India’s road infrastructure development programme.

Construction is often a noisy business, but building a light-rail tunnel in a dense urban area — and near freight-train operations — can be downright challenging. Add to the mix: Some neighbors who ...

Spain has begun investigating the possibility of connecting Europe to Africa via an underwater tunnel to Morocco. On Saturday, the Spanish government allocated €1.6 million (roughly $1.7 million) to a ...