Interstate Highways in Puerto Rico

There are three primary Interstate highways in the U.S. state of Puerto Rico - Interstate PR-1 (I-PR1), Interstate PR-2 (I-PR2) and Interstate PR-3 (I-PR3). The Interstate Highways in the U.S. state of Puerto Rico are owned and maintained by the the Puerto Rico Department of Transportation and Public Works (Spanish: Departmento de Transportación y Obras Públicas) or DTOP. Totaling 249.77 miles (401.966 kilometers) in length, Puerto Rico's Interstate highways were originally unsigned but considered part of the Dwight D. Eisenhower National System of Interstate and Defense Highways, and remained unsigned until all three routes were fully upgraded to Interstate standards in 2016. Puerto Rico's Interstate highways receive up to 90% of their funding through the Interstate Highway program, and their numbering does not follow the even-and-odd-number rule used in the United States mainland that indicates direction of travel. The speed limit on all Interstate highways in Puerto Rico in all jurisdictions is 55 mph (90 km/h).

A shield for Interstate PR-1.
Interstate PR-1 (I-PR1) - Runs along Puerto Rico Highways 52 and 18 from I-PR2 in Ponce to I-PR2 and I-PR3 in San Juan. The length of Interstate PR-1 is 71.08 miles (114.39 kilometers) long.

A shield for Interstate PR-2.
Interstate PR-2 (I-PR2) - Runs along Puerto Rico Highways 2 and 22 from I-PR1 in Ponce to I-PR1 and I-PR3 in San Juan. The length of Interstate PR-2 is 138.13 miles (222.30 kilometers) long, making I-PR2 the longest Interstate highway in Puerto Rico.
A shield for Interstate PR-3.
Interstate PR-3 (I-PR3) - Runs along Puerto Rico Highways 53, 3, 66 and 26 from I-PR1 and I-PR2 in San Juan to Humacao. The length of Interstate PR-3 is 40.56 miles (65.27 kilometers) long.

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