There are few roads in the world that can boast that they connect two ends of a continent without interruption, but surely one of the most secluded is this highway connecting the cities of Adelaide to Darwin in the Northern Territory. More than 2800 kilometers are lost in the horizon, and most of them run through the interior desert country. That being said, it is the main supply route of the few communities that exist in the desert, so often you'll encounter "road trains," heavy trucks (they can take up to four trailers) that carry nearly all goods circulating in the area. These trucks have priority movement over any other vehicle on these roads, and occupy more than their own driveway, so if you see one approaching it's better you pull over (they won't stop for you). As in most of Australia, it's best not to drive at night if you can avoid it. The animals are particularly active at sunset and the chances that you end up hitting a kangaroo are high. I loved the experience of being able to be part of this journey, between Alice Spings and Uluru, and so terribly empty to absorb what is this country / continent. This stretch is the busiest of the entire route and has stations at "reasonable" distances (one every 300kms or so). To travel the more isolated parts of the highway you need additional water tanks and fuel. And a lot of time!