SBS Transit Ltd provides bus and rail public transportation services, and consultancy services relating to land transport in Singapore. It operates through Public Transport Services and Other Commercial Services segments. The company operates MRT Line, an automatic underground heavy metro system; Downtown Line; and Sengkang and Punggol light rail transit systems. It also offers advertisement on the buses and trains; wheelchair accessible services; and road show and shop space for rent at bus interchanges and rail stations.