The São Paulo Metropolitan Train is a public transit rail system implanted in Greater São Paulo, serving 23 of its 39 municipalities. It has 273 km (170 mi) of length, 7 lines and 94 stations, transporting approximately 3 million passengers per day. Currently, it is operated by the state-owned company Companhia Paulista de Trens Metropolitanos (CPTM), but two of the lines were auctioned to ViaMobilidade, which began operating their administrations in January 2022.

Line 10 (Turquoise) (Portuguese: Linha 10 – Turquesa), formerly Line D (Beige), is one of the seven lines operated by CPTM and one of the thirteen lines that make up the São Paulo Metro Rail Transport Network, in Brazil.