Work starts on Madrid Metro Line 5 airport extensionAlso in progress are studies for extending Line 1 to Madrid Nuevo Norte development. Photo Credit: Madrid MetroAlso in progress are studies for extending Line 1 to Madrid Nuevo Norte development. 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, NewsTags: Madrid, Madrid Metro, Premium, SpainMore on this story Madrid Metro opens Line 3 extension to El CasarApril 24, 2025 Madrid awards metro extension contractMarch 4, 2025 Madrid Metro to automate lines 6 and 8February 26, 2024