Salvador Pacetti and Paulo Virgínio road

SP-171
Route information
Length	70.000 km (43.496 mi)
Location
Country	Brazil
State	São Paulo
Highway system
Highways in Brazil Federal São Paulo State Highways

The SP-171 is a route of Brazil, under the jurisdiction of the state of São Paulo, connecting the Paraíba Valley to the northern coast of São Paulo and the southern lowlands of Rio de Janeiro. It has two official names: “Rodovia Paulo Virgínio” road (from km 0 to km 47) and “Rodovia Salvador Pacetti” road (from km 47 to km 70).

With an extension of seventy kilometers, the SP-171 connects the Via Dutra (Interstate BR-116), in Guaratinguetá (SP), to the Cunha downtown (SP) and to the Via Rio-Santos (Interstate BR-101) in Paraty (RJ), through its Fluminense extension (extending for another twenty-one kilometers) as the route RJ-165. After the inauguration of the “Estrada Comendador Antônio Cônti” road (as the RJ-165 is officially known) in 2017, it was fully integrated into the BR-459 federal highway. Currently, its entire route is managed by the Department of Road routes of the State of São Paulo (DER-SP). The direction of kilometer counting goes from north to south and passes through the geographic locations of Paraitinga and Paraibuna valleys, located at the top of the Paraíba River basin. After passing through the Taboão (a Cunha's neighborhood), the last kilometer (km 70) becomes km 21 of the RJ-165, and the countdown begins until the Via Rio-Santos Interstate interchange, concluding the connecting route.

The SP-171 provides access to important environmental preservation areas, such as Serra do Mar and Serra da Bocaina parks. It also connects sites and places that make up Brazil's cultural and historical heritage. Its layout is old and dates back to the period when the Brazil belonged to the Kingdom of Portugal: it became the southern fork of the Caminho dos Paulistas way (also called Caminho Geral do Sertão way) and was part of the Caminho do Ouro – “Golden way”, in English language – (also called Caminho Velho – “Old way” –), one of the royal roads of the Portughese Colony. Today, it is the main way in Cunha and is also the largest public road in the municipality: it is approximately fifty kilometers within the Cunha's territory from the city border with Guaratinguetá (popularly known simply as "Guará") to the border with the Rio de Janeiro state.