Line 4 (Yellow) (Portuguese: Linha 4–Amarela) is one of the six lines that make up the São Paulo Metro and one of the thirteen lines that make up the São Paulo Metropolitan Rail Transportation Network. Originally called Southeast-Southwest Line, the line goes from Vila Sônia to Luz and currently has 11 stations along its 12.8 km (8.0 mi) and transports around 800,000 users/day. It is one of the most modern subway lines in Latin America and the first line in the region to utilize driverless trains and platform screen doors in all stations.