Bridge and highway designers, also known as engineers, are professionals who specialize in the design and construction of bridges and highways. They are responsible for creating plans and designs that meet safety standards and are cost-effective. They must also consider environmental factors, such as the impact of the bridge or highway on the surrounding area. Engineers must also be knowledgeable about the materials used in construction and the latest technologies available. They must also be able to work with other professionals, such as architects and surveyors, to ensure that the project is completed successfully.