BR-319 is a Brazilian highway with a total length of 857 km, linking the cities of Manaus and Porto Velho on the Região Norte do Brazil. The road, impassable during rainy days because the mud, crosses the States of Amazonas and Rondônia.
BR-319 starts in Manaus, the capital of the state of Amazonas, situated at the confluence of the Negro and Solimões rivers. It is the most populous city of Amazonas. After 857km the road arrives to Porto Velho, the capital of the Brazilian state of Rondônia, in the upper Amazon River basin.
The road bad conditions, with extremely large pot holes could potentially pop a tire, crack a rim, or screw up your cars allignment. The road was built by Brazil's military regime in the 1970s with the intent to open up the Amazon rainforest for economic purposes and crosses the cities of Humaitá, Lábrea, Manicoré, Careiro, Manaquiri, Autazes and Careiro da Várzea. The road includes sections of asphalt, gravel and sand.
This road is usually open all year, but during rainy months can be closed when the access is not cleared of mud. Groups of scientists ask for the cancellation of the reconstruction of highway BR-319, which connects Porto Velho to Manaus. The main argument is that the road would more bring deforestation for one of the preserved regions of the Amazon. However, as it was one of the first roads through the Amazon, know-how was minimal, and the road was built on swampland. This, together with annual floods that washed away dozens of bridges, contributed to the road falling into disuse. Nowadays, all trucks go by boat, and only the adventurous attempt it, camping rough along the way.
More info&pics: http://tarmo-rtw.blogspot.com.es/2013/09/humaita-manaus-br-319-day-2.html