Puerto Rico Highway 101 (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.
Puerto Rico Highway 3101 (PR-3101) is a road parallel to PR-101 between the municipalities of Lajas and San Germán. It is known as Calle San Blas in downtown Lajas.