Spain planned and proposed metro lines. Future underground routes and rapid transit expansion projects before construction begins.
Spain metro and subway lines formally proposed or in active planning: future underground corridors announced, studied or included in urban transport master plans but not yet under construction. Shows where cities plan to extend rapid transit coverage — new orbital lines connecting suburbs without routing through the city centre, extensions to areas beyond the existing network and entirely new metro systems in cities currently without subway.
Spain has 717 proposed railway segments including 581 railway, 53 tram, 34 metro, 18 light rail and 31 narrow gauge.