Puerto Rico Highway 27 (PR-27) is a northâÂÂsouth avenue located in San Juan, Puerto Rico, known as Avenida José Celso Barbosa. This highway extends from Avenida 65 de InfanterÃÂa (PR-3) to Avenida Borinquen (PR-36) in Santurce, east of downtown RÃÂo Piedras and Hato Rey.