The Autoridad Metropolitana de Autobuses (AMA, English: Puerto Rico Metropolitan Bus Authority) is a government-owned corporation and public transport bus service based in the San Juan metropolitan area. It is part of the Puerto Rico Department of Transportation and Public Works and the Puerto Rico Integrated Transit Authority (ATI). In 2021, the system had a ridership of 729,800, or about 3,400 per weekday as of the second quarter of 2022.