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 private travel and helps reduce traffic congestion and pollution. Many cities invest in public transportation to improve mobility and accessibility for residents. Systems like subways and light rail can connect different neighborhoods, making it easier for people to reach work, school, and other essential services. Overall, public transportation plays a crucial role in urban planning and sustainability.