Town of Maricá, Brazil, free system has 17,000 passengers per day, now adding 9 buses

Since 2013, when it was created, the EPT fleet has made over 15 million trips. Per day, the system carries 17 thousand passengers.

  
https://www.marica.rj.gov.br/2019/11/13/novos-vermelhinhos-entram-em-operacao-na-proxima-sexta-feira-15-11/