Trolleys are wheeled vehicles used for transporting goods or passengers. They can be found in various forms, such as shopping trolleys in supermarkets or streetcars that run on tracks. Trolleys are designed to make moving items easier, often featuring a handle for pushing or pulling. In public transportation, trolleys, also known as trams or streetcars, operate on fixed routes within cities. They are powered by electricity, usually supplied through overhead wires. Trolleys help reduce traffic congestion and provide an eco-friendly alternative to cars, making them a popular choice for urban commuting.