​Operating as a branch of the Department of Transportation and Public Works of Puerto Rico (DTOP), the service is more commonly known by its abbreviation in Spanish. Autoridad Metropolitana de Autobuses de Puerto Rico or AMA.

​Type: ​Public/Private, Some routes operated by contractor First Transit

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Union Representation: Not Unionized

Fleet Size: ​149 Transit Buses, 33 Suburban Medium Duty Buses, 60 Paratransit Vehicles

Routes: ​50

​Manufacturer and Powerplant: ​As Puerto Rico is a U.S. Territory, American and Canadian Manufacturers have access to sell which makes P.R. unique among its island neighbors. DTOP procures from Gillig, NABI, Orion, NovaBus, New Flyer and Ford. The majority of the fleet is diesel powered. The oldest buses in its fleet are 2002 NovaBus RTS models which have been shipped back to the U.S. for refurbishment and will be put back in service after mechanical and safety improvements.

​Fare Collection: ​There is no contactless card payment system in Puerto Rico, however DTOP does issue a magnetic strip card that is reloadable and can be used on both the subway and bus networks. Buses cost just .75 cents with cash fare. It is similar to the MetroCard used in New York City.

​Livery: ​AMA buses use the DTOP's upbeat themes of Magenta, Blue, Yellow and Silver. Express buses use silver as the dominant color while some buses in the city may sometimes be entirely white.

​Innovations: ​DTOP operates the only U.S. style mass transport system in the Caribbean. The system also hosts the only underground subway network in the Caribbean as well. The Government's Integrated Transit Plan has detailed expansion projects planned to better integrate the inner cities with Puerto Ricos many highway networks using express buses.