The Metrô de São Paulo is a rapid transit system serving the city of São Paulo, Brazil. It began operations in 1974 and has since expanded to include six lines and over 100 stations, making it one of the largest metro systems in the world. The metro is known for its efficiency and cleanliness, providing a vital transportation option for millions of daily commuters. The system operates from early morning until midnight, with trains running frequently to accommodate the high passenger volume. The Metrô de São Paulo is an essential part of the city's public transport network, helping to reduce traffic congestion and pollution in the densely populated urban area.