Bridge construction involves the process of building structures that span physical obstacles, such as rivers or roads, to provide passage for vehicles and pedestrians. Engineers and architects design bridges to ensure they can support the weight of traffic while withstanding environmental factors like wind and earthquakes. Common materials used in bridge construction include steel, concrete, and wood. The construction process typically includes several stages: planning, design, and actual building. During planning, surveys and studies assess the site and determine the best type of bridge, such as beam, arch, or suspension. Once the design is finalized, construction crews prepare the site, lay foundations, and assemble the bridge components to complete the project.