CPTM

True intercity passenger rail is essentially nonexistent in Brazil, so this entry uses the closest genuine fit: São Paulo's state-owned metropolitan rail operator, which has its own official app ('CPTM Oficial') with real-time line status and is a common subject of outage/delay searches. Third-party status aggregators (e.g. Mobilidade360) track CPTM/Metrô-SP/ViaMobilidade line status but there is no official CPTM public status page. State-owned, not a national/global platform, hence state=SP.