<page_title> List of United States rapid transit systems by ridership </page_title> <table> <cell> New York City Subway <col_header> System </col_header> </cell> <cell> Chicago "L" <col_header> System </col_header> </cell> <cell> 3. <col_header>  </col_header> </cell> <cell> Washington Metro <col_header> System </col_header> </cell> </table>
Washington Metro is the third rapid transit system in the United States after the New York City Subway and Chicago "L".