High Quality Content by WIKIPEDIA articles! The Valencia Metro is the public mass transit system of Valencia, Carabobo, Venezuela and its suburbs Naguanagua and San Diego. The metro system was officially opened on 18 November 2006 with 3 stations along a 4.7 km (3 mile) route, operating for limited hours but providing service free of charge. Normal revenue service with 7 stations began 18 November 2007. Currently Valencia Metro operates one transit line, with two lines under construction and a fourth under consideration.