The primary purpose of public transportation is to provide efficient, affordable, and accessible means of travel for a large number of people within a city or between regions. It aims to reduce traffic congestion, decrease environmental impact, and offer an alternative to private vehicles. Public transportation systems, which include buses, trains, subways, and trams, facilitate mobility for all citizens, including those without access to a car. By promoting mass transit systems, cities can encourage sustainable commuting, foster economic growth, and improve overall quality of life for residents.