Integration Bridge, International road bridge between Santo Tomé, Argentina and São Borja, Brazil

The Integration Bridge is a 1,402.5 m road viaduct over the Uruguay River linking Santo Tomé, Argentina, to São Borja, Brazil. It rests on piles and carries a roadway 8.30 m wide with two pedestrian walkways. On the Argentine bank it joins National Route 121, a 9 km extension of National Route 14; on the Brazilian bank it meets highway BR-285.

Built between April 1996 and December 1997, the bridge was inaugurated on 9 December 1997 by presidents Carlos Menem and Fernando Henrique Cardoso. It was designed to relieve the traffic concentrated at Paso de los Libres and Uruguaiana, where 80% of road exchange had passed over the Agustín P. Justo–Getúlio Vargas bridge. The 40 million dollar project included Mercosur's first unified customs centre, funded partly by the Italian-led Impregilo consortium.

The bridge takes its name from the Mercosur integration project, and its customs complex was the first unified border post in Latin America, opened in 1997. Trucks pay a fee for staying while their paperwork is processed, and the complex on the Argentine side covers 215 hectares with banks, exchange offices and restaurants.

Access is straightforward via the national highways that lead directly to the bridge on each side. Crossing takes only a few minutes by any vehicle, though proper travel documents are required for border crossing.

The bridge and its customs complex were built as Latin America's first integrated customs post, a pioneering public-private venture between Brazil, Argentina and the Impregilo-led consortium. The 40-million-dollar project included a 4,000 m² customs warehouse, inspection pits and a cargo platform, so trucks clear both borders in one stop.