 As a result, on July 26, 2010, Metro voted to purchase 300 7000 series cars to replace the remaining 1000 series cars. An additional 128 7000 series cars were also ordered to serve the new Silver Line to Dulles Airport (64 for each phase). In May 2013, Metro placed another order for 100 7000 series cars, which will replace all of the 4000 series cars. By June 2015 WMATA plans to exercise their remaining options to purchase an additional 220 7000 series railcars for fleet expansion, bringing the total number of 7000 series railcars on order to 748.
