Puerto Rico Highway 20
| Ruta 20 | ||||
| Expreso Rafael Martínez Nadal | ||||
| Route information | ||||
| Maintained by Metropistas | ||||
| Length | 9.5 km (5.9 mi) | |||
| Major junctions | ||||
| South end | PR-1 in Río | |||
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| North end | PR-2 in Pueblo Viejo | |||
| Location | ||||
| Country | United States | |||
| Territory | Puerto Rico | |||
| Municipalities | Guaynabo, San Juan | |||
| Highway system | ||||
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Puerto Rico Highway 20 (PR-20) or Expreso Rafael Martínez Nadal is a short tollway located between the municipalities of Guaynabo and San Juan in Puerto Rico. With a length of 9.5 km (5.9 mi), it begins at PR-2 interchange in Pueblo Viejo barrio and ends at PR-1 junction in Río barrio.