Puerto Rico Highway 47Puerto Rico Highway 47, also known as Calle De Diego, is an urban road in Río Piedras, Puerto Rico. This road extends from PR-3 to downtown Río Piedras.Route descriptionPR-47 begins at PR-3 and ends at downtown Río Piedras, in the Paseo De Diego, a commercial street in downtown Río Piedras. Among its intersections are the PR-181 and PR-27.