Puerto Rico Highway 178
| Ruta 178 | ||||
| Carretera Monseñor José Antonio Colón Ferrer | ||||
| Route information | ||||
| Maintained by Puerto Rico DTPW | ||||
| Length | 3.2 km (2.0 mi) | |||
| Existed | 1953–present | |||
| Major junctions | ||||
| CCW end | PR-3 in Guásimas | |||
| CW end | PR-3 / PR-753 in Arroyo barrio-pueblo–Palmas–Pitahaya | |||
| Location | ||||
| Country | United States | |||
| Territory | Puerto Rico | |||
| Municipalities | Arroyo | |||
| Highway system | ||||
  | ||||
Puerto Rico Highway 178 (PR-178) is the main access to downtown Arroyo, Puerto Rico. This road extends from PR-3 in Guásimas to returning again to PR-3 at its junction with PR-753 between downtown, Pitahaya and Palmas barrios.
- Sign for PR-178, entering downtown Arroyo