Railway tunnel construction shortens the route length by allowing rail lines to pass through natural obstacles. These are particularly prevalent when it comes to passages and tunnels through mountains ...

The rugged geography, dense population, and arid nature of Southern California has created the need for some of the most unique and complex tunnel systems anywhere in the world, and over the last 150 ...

Railways tend to work best when they are reasonably flat and level, but unfortunately for engineers, the world was not formed with railways in mind. Throughout the history of rail, new solutions have ...