Puerto Rico Highway 101, or PR-101, is a rural road leaving the town of Boquerón, Cabo Rojo and Lajas, to the town of San Germán. Among their intersections are the PR-100, PR-301 (to El Combate), PR-103 PR-116 (to Guánica), PR-166 and PR-102.
Map of PR-101, Puerto Rico
References
Puerto Rico Highway 101 Wikipedia(Text) CC BY-SA