Puerto Rico Highway 31
| Ruta 31 | ||||
| Route information | ||||
| Maintained by Puerto Rico DTPW | ||||
| Length | 25.55 km (15.88 mi) | |||
| Existed | 1953–present | |||
| Major junctions | ||||
| West end | PR-30 / PR-189 in Ceiba Norte | |||
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| East end | PR-3 in Mariana | |||
| Location | ||||
| Country | United States | |||
| Territory | Puerto Rico | |||
| Municipalities | Juncos, Las Piedras, Naguabo | |||
| Highway system | ||||
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Puerto Rico Highway 31 (PR-31) is a main, rural highway connecting Juncos with Naguabo in eastern Puerto Rico. This road begins at Puerto Rico Highway 198 and ends at Puerto Rico Highway 3.