Puerto Rico Highway 21
Puerto Rico Highway 21 is the main highway to get to the Medical Center and Veterans Hospital in San Juan, Puerto Rico. Its western terminus is located at PR-19 intersection near Guaynabo and leads to San Juan before ending at PR-1 junction near Río Piedras.Route description
With a length of about, PR-21 begins at its intersection with PR-1 and PR-176 in El Cinco, a barrio located south of Río Piedras. To the west, PR-21 is an avenue with three lanes per direction until its interchange with Puerto Rico Highway 18 in Monacillo Urbano. From there, the highway narrows to two lanes per direction until its junction with Avenida José de Diego, where it reduces to a single lane per direction to the west. Between Monacillo Urbano and Gobernador Piñero barrios, the road has an intersection with PR-841, which leads to PR-177 between San Juan and Guaynabo, and also has an access to PR-20 south, which leads to Guaynabo. Then, its western terminus is located at PR-19 in Gobernador Piñero barrio, just at the entrance to Martínez Nadal station of the Tren Urbano.History
was previously numbered as PR-21. Perhaps there were plans to connect current PR-21 to current PR-6, but such plans were never realized. Instead, the Tren Urbano tracks were built between Bayamón, Caparra, Torrimar and PR-20.Major intersections