Puerto Rico Highway 5 (PR-5) is a main highway in the San Juan Metropolitan area which connects the cities of Cataño to Bayamón[4] and is being extended and converted to a tollway (it has a toll plaza[5] in Bayamón near PR-2 and PR-174) to access the municipalities of Naranjito and Comerío.

PR-5 begins in a dead end in downtown Cataño, on a peninsula overlooking San Juan Bay.

It crosses downtown Cataño on an urban street, passing through the main square.

[6] After the PR-22 intersection, it becomes a freeway, paralleling the Metro Urbano bus rapid transit route.

This segment passes through the Jesús Izcoa Moure Bridge and is a freeway until the junction with PR-148.