The challenge moves to the South American continent, where the truckers are paired into new teams and given the job of navigating one of the most treacherous roads in Brazil. With a load of concrete pipes weighing half a ton each, they journey from Alta Floresta in the state of Mato Grosso to Novo Progresso in Para, a 360-mile trip along the unfinished BR163 road - but the unstable cargo proves too difficult for some of the drivers to handle