The article discusses how people are becoming more cautious about technology and its impact on society. It focuses on how this change in attitude affects the design of bridges. The researchers outline the general principles for designing bridges and how they should fit into their surroundings. They also talk about using models to shape bridge forms and the main factors that determine their shapes. Different types of bridges, like concrete plate and girder bridges, frame and arch bridges, and steel bridges, are discussed in the paper.