Have you ever had the opportunity to drive above trees? Many highways passing through the forests, but there are only a few who pass above them. The construction of these sections of highways is certainly expensive, but their significance for the environment is very high : noise reduction, protection of animals and trees.



1. Rodovia dos Imigrantes Highway Viaducts, Brazil

The Rodovia dos Imigrantes (SP-160) crossing the Serra do Mar in São Paulo State, Brazil. link The original highway was built as a single carriageway in 1986, and a second carriageway was added in 2002. link reduction in deforestation during construction. Advanced technology allowed for a more modern design and a dramaticduring construction. link The complex terrain the motorway overcomes turned it into a worldwide reference link A view of the north and south carriageways of Rodovia dos Imigrantes, one crossing over the other link High strutting six-lane bridges seemingly floating over the tropical rain forest which covers the steep faces of the Serra do Mar, the 800m (2,625 ft) high cliff range which separates the São Paulo plateau from the seaside lowlands. link, map]

2. Interstate H-3 Highway Viaducts, Hawaii, USA

Also known as the "John A. Burns Freeway". This 16-mile (26km) road is a beautiful engineering feat. link It cost almost $100-million per mile to build and took 37 years to complete--20 years of that time was taken doing environmental impact studies. But the results are fantastic. link This view show the highway coming out of the tunnel on the east side of the Koolau Mountains. link link2, map] Viaducts of H-3 within Halawa Valley [ link1

3. Europabrücke or Europe's Bridge, Austria