Metro warned its funding partners – VA, MD and DC – that its option to purchase an additional 220 7000-series cars expired in June 2015 and required a funding commitment of $614 million for rolling stock, and $856 million for related infrastructure upgrades. Subsequently, in June 2015, the Federal Transit Administration cleared a major obstacle that was preventing Metro from purchasing the additional 220 railcars by approving an early retirement for the 192 5000-series railcars in order to avoid expenses and to upgrade rail service. Metro's funding partners, VA, MD and DC, agreed to fund the additional purchase of 220 7000-series cars, bringing the total purchase up to 748 railcars.