A trolley bus is a type of public transportation vehicle that resembles a traditional bus but is powered by electricity from overhead wires. It has rubber tires and can operate on both roads and dedicated tracks, making it a versatile mode of transportation. The trolley bus is typically equipped with poles or pantographs that connect to the overhead wires, allowing it to draw power and run without emitting harmful emissions. This eco-friendly alternative to diesel buses provides a quiet and smooth ride for passengers while reducing air pollution in urban areas.