Transports Metropolitans de Barcelona (TMB) is the public transportation system serving the city of Barcelona, Spain. It includes a network of metro lines, buses, and trams that connect various neighborhoods and key locations throughout the city. TMB aims to provide efficient and accessible transport options for residents and visitors alike. The Barcelona Metro consists of multiple lines that cover extensive areas, while the bus network offers numerous routes to reach destinations not served by the metro. TMB also promotes sustainability by encouraging the use of public transport to reduce traffic congestion and pollution in the urban environment.