<page_title> List of United States light rail systems by ridership </page_title> <section_title> List </section_title> <table> <cell> 3 <col_header>  </col_header> </cell> <cell> Muni Metro (incl. E Embarcadero & F Market) <col_header> System </col_header> </cell> <cell> 162,500 <col_header> Avg. daily weekday boardings (Q4 2017) </col_header> </cell> </table>
With an average weekday ridership of 162,500 passengers as of the fourth quarter of 2017, Muni Metro is the United States' third busiest light rail system.