<page_title> List of United States commuter rail systems by ridership </page_title> <section_title> List of United States commuter rail systems by ridership </section_title> <table> <cell> 1 <col_header> Rank </col_header> </cell> <cell> MTA Long Island Rail Road <col_header> System </col_header> </cell> </table>
Long Island Rail Road is the busiest commuter railroad in America.