PUERTO RICO Click on your county to find public transportation options in your community. San Juan LARGE TRANSIT AGENCIES MBA (Metropolitan Bus Authority)(in Spanish) OTHER TRANSIT AGENCIES ATI (Alternativa de Transporte Integrado) Municipality of San Juan PRDTOP (Puerto Rico Department of Transportation and Public Works)(in Spanish) PRHTA (Puerto Rico Highway and Transportation Authority) PRPA (Puerto Rico Ports Authority) Note: Some counties may also be served by transit agencies in adjoining counties.