Bridge experts, or engineers, are professionals who specialize in the design and construction of bridges. They are responsible for ensuring that bridges are built to meet safety standards and are able to withstand the elements. Engineers must have a strong understanding of mathematics, physics, and engineering principles in order to create bridges that are both structurally sound and aesthetically pleasing. They must also be knowledgeable about the materials used in bridge construction, such as steel, concrete, and timber. Engineers must also be able to work with other professionals, such as architects and surveyors, to ensure that the bridge is built correctly.