To Foz and Matosinhos (1872-1914)
Urban mule tram-lines (1875-1904)
Electrification (1895-1904)
Expansion, part I (1904-1914)
Expansion, part II (1914-1935)
Expansion, part III (1934-1945)
Zenith (1946-1958)
Decline, part I (1958-1966)
Decline, part II (1966-1975)
Almost faded away (1975-1996)
Into the future (since 1996)
Freight branches
Trolleybus network
Depots & Power Plants
Network Metro do Porto
Funicular de Guindais