[2] The road runs the same course as the historic Carretera Central.

The Ponce-to-Coamo section of PR-14 was built under the direction of Spanish engineer Raimundo Camprubí Escudero (b. Pamplona 15 March 1846 – d. Madrid 1924).

[3] Except in the city of Ponce where (with the exception of the Ponce Historic Zone) the road is a 4-lane road known as Avenida Tito Castro, the rest of PR-14 is a two-lane country road as it makes its way through the four towns it runs through, Juana Díaz, Coamo, Aibonito and Cayey.

[5] Puerto Rico Highway 14R (Spanish: Carretera Ramal 14, abbreviated Ramal PR-14 or PR-14R) is a road that branches off from PR-14 and ends at PR-123 in downtown Ponce.

Its route is part of Unión and Guadalupe streets.