Transportation
Main article: Transportation in Puerto RicoCities and towns in Puerto Rico are interconnected by a system of roads, freeways, expressways, and highways maintained by the Highways and Transportation Authority under the jurisdiction of the U.S. Department of Transportation, and patrolled by the Puerto Rico Police Department. The island's metropolitan area is served by a public bus transit system and a metro system called Tren Urbano (in English: Urban Train). Other forms of public transportation include seaborne ferries (that serve Puerto Rico's archipelago) as well as Carros Públicos (private mini buses).
The island has three international airports, the Luis Muñoz Marín International Airport in Carolina, Mercedita Airport in Ponce, and the Rafael Hernández Airport in Aguadilla, and 27 local airports. The Luis Muñoz Marín International Airport is the largest aerial transportation hub in the Caribbean, and one of the largest in the world in terms of passenger and cargo movement.
Puerto Rico has nine ports in different cities across the main island. The San Juan Port is the largest in Puerto Rico, and the busiest port in the Caribbean and the 10th busiest in the United States in terms of commercial activity and cargo movement, respectively. The second largest port is the Port of the Americas in Ponce, currently under expansion to increase cargo capacity to 1.5 million twenty-foot containers (TEUs) per year.
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