A single-decker bus is a type of public transportation vehicle that has only one level for passengers. It typically features a large, enclosed cabin with rows of seats and is designed to carry a significant number of people. These buses are commonly used in urban areas for local routes, providing an efficient way to travel short distances. Single-decker buses are often powered by diesel or electric engines and can be found in various sizes and designs. They are equipped with doors for easy boarding and alighting, and many have features like low floors for accessibility. Cities around the world, including those in the United Kingdom and United States, utilize single-decker buses to enhance public transit systems.