With few roads and no rails, transporting goods across the Australian outback over two million square miles of untamed wilderness is close to impossible. Enter road trains, the biggest and heaviest freight vehicles in the world. These 650 horsepower beasts are like gigantic, 100-wheel centipedes and the faster they go, the more money they make. From roads washed away by floods to 120 degree heat, and raging cyclones to truck-tipping anthills, well buckle up and follow the battle-tested drivers of these road trains as they deal with the toughest conditions on earth.