This project is a CAD for the design of a three span highway bridge Reference drawings include plan, elevation, section, cross section, general layout, capping beam structure, pile foundation plan, bridge deck sleeper, sidewalk slab structure, ear wall, pier pile, abutment pile structure, expansion joint, bridge deck continuous structure, etc. The drawings are complete in content, clear in expression, and precise in drafting. Designers are welcome to download and use them.