Public transportation refers to systems of transport that are available for use by the general public. This includes buses, trains, subways, and trams, which operate on scheduled routes and can accommodate many passengers at once. Public transportation is often more affordable than owning a private vehicle and can help reduce traffic congestion and pollution in urban areas. Many cities invest in public transportation to improve accessibility and mobility for their residents. Systems like subways and light rail can connect different neighborhoods, making it easier for people to reach work, school, or recreational activities. Additionally, public transportation can promote social equity by providing access to those who may not have a car.