A toll bridge is a bridge where drivers must pay a fee, known as a toll, to cross. This fee helps cover the costs of building, maintaining, and operating the bridge. Toll bridges can be found in many places around the world and often have booths or electronic systems to collect payments. Toll bridges can vary in design and size, from small local crossings to large structures like the Golden Gate Bridge. Some tolls are collected only in one direction, while others may charge in both directions. The revenue generated from tolls is typically used for infrastructure improvements and public transportation projects.