Porto metro is a public transport system of Grande Porto, Portugal, that consists in an electrified railway network, underground in Porto Center and in outskirts surface. It is a recent network, divided in 6 metropolitan lines (with eight services, including an express service) spread for eight municipalities in the metropolitan area: Porto, Maia, Matosinhos, Póvoa de Varzim, Vila do Conde, Vila Nova de Gaia, Gondomar and Trofa and a funicular line, Guindais Funicular. It has a total of 81 stations divided for 70 km of duplicated commercial lines, mainly in surface, with 9,5 km of buried network. Line A-Blue (Dragão Stadium– Senhor de Matosinhos), B-Red (Dragão Stadium – Póvoa de Varzin), C–Green (Campanhã - ISMAI), D–Yellow (São João Hospital– Vila D’Este), E-Purple (Dragão Stadium – Aeroporto), F-Orange (Fânzeres – Senhora da Hora) e G-Pink (Casa da Música – São Bento) compose the system. In the first 10 years transported 380 million users, having increased numbers: 53,5 million in 2010 and 57,7 million in 2015.

CJC worked in the basic projects and author’s supervision in line C-Greeen, D-Yellow and G-Pink of Porto metro.

Source: https://pt.wikipedia.org/wiki/Metro_do_Porto