Puerto Rico Highway 15

Highway 15
Highway 15
Ruta 15
Route information
	Maintained by Puerto Rico DTPW
Length	25.80 km (16.03 mi)
Existed	1953–present
Major junctions
South end	PR-3 in Guayama barrio-pueblo
	PR-179 in Caimital; PR-712 in Palmas; PR-708 in Jájome Alto; PR-741 in Jájome Alto–Culebras Bajo; PR-7737 in Culebras Bajo; PR-7715 in Quebrada Arriba–Monte Llano; PR-1 in Monte Llano–Quebrada Arriba–Cayey barrio-pueblo
North end	PR-14 in Cayey barrio-pueblo
Location
Country	United States
Territory	Puerto Rico
Municipalities	Guayama, Cayey
Highway system
	Roads in Puerto Rico; List;
	Carretera #4
	U.S. National Register of Historic Places
Location	Cayey and Guayama
Coordinates	18°01′48″N 66°03′53″W / 18.0301°N 66.0648°W
Built	19th-century
NRHP reference No.	100005741
Added to NRHP	October 30, 2020

Puerto Rico Highway 15 (PR-15), formerly Road No. 4 (Carretera #4), is a main highway connecting the municipalities of Guayama and Cayey in Puerto Rico. With a length of 25.80 km (16.03 mi), it extends from PR-3 in downtown Guayama to PR-14 in downtown Cayey.