After a brief trip through the history of the railway, from its origin until nowadays, this book describes the features of the elements that make up the railway super-structure, along with the execution of the specialist teams of some singular works. Likewise, the book develops a complete study of the camber theory applied to the railway, as well as of the bases and standards to be considered for the design of the railway super-structure. It explains the properties of the Clothoid regarding its use as transition curves, and subsequently the method of "Straightening of Railway Curves" is...