Filed under: DC Metro WMATA Out With The Old, In With The New By Michelle Goldchain@goldchainam Dec 9, 2014, 11:30am EST The Metro's railcars are a problem, and it's time to get them replaced. By next year, eight 8-car 7000-series rail cars will be introduced. By 2017, every single 1000- and 4000-series railcar that the Metro currently uses will be replaced. [WAMU]