Trensurb

Federal state-owned urban rail operator serving the northern axis of the Porto Alegre metropolitan region (Porto Alegre, Canoas, Esteio, Sapucaia do Sul, São Leopoldo, Novo Hamburgo); 22 stations, ~43.8 km, ~175k daily riders. Unlike Metrô-SP/MetrôRio (state/private), Trensurb is federally owned, adding further geographic and ownership diversity to the Rail subcategory. No public developer API or dedicated status page found.