A tram is a type of public transportation vehicle that runs on tracks, typically found in urban areas. It is designed to carry passengers along specific routes, often sharing the road with other vehicles. Trams are usually powered by electricity, which is supplied through overhead wires or ground-level systems. Trams can vary in size and design, but they generally have multiple carriages to accommodate many passengers. They are an efficient way to reduce traffic congestion and provide a reliable means of transport. Cities like San Francisco and Melbourne are known for their extensive tram networks.