This French-language technical reference presents the principles and methods involved in designing and building bridges. The second edition covers the major stages and components of bridge projects, including general planning considerations, foundation systems, supports and bearings, and the construction of common bridge types. Intended for engineers, students, and professionals working in civil infrastructure, the work emphasizes practical engineering knowledge alongside the technical reasoning needed for bridge design and execution. It addresses how bridge structures interact with their foundations and supports, and how standard bridge works are specified, analyzed, and built in practice. The book serves as a professional reference for readers seeking a structured overview of bridge engineering, from project conception through construction details. Its scope is focused on applied civil engineering rather than narrative or historical treatment, making it useful for technical study and consultation in the field of transportation infrastructure.