Madrid Metro opens Line 3 extension to El Casar3.5km extension improves metro links to the southern suburbs. 3.5km extension improves metro links to the southern suburbs. Premium Subscription Required You must be a premium subscriber to access this content: View Subscription Options Already a subscriber? Log in here Categories: Europe, Metros, News, Passenger, RegionsTags: Madrid, Madrid Metro, Premium, SpainMore on this story Madrid awards metro extension contractMarch 4, 2025 Madrid Metro Line 3 extension now 65% completeFebruary 28, 2024 Madrid Metro to automate lines 6 and 8February 26, 2024