In the local parlance, a road train consists of a prime mover (or tractor) that hauls two or more trailers. The bigger challenge is actually stopping, and that takes great care and makes road trains unsuitable for crowded roads. As far as applications go, road trains are used for hauling all sorts of goods and material across Australia. Largely by virtue of their length alone, road trains are restricted in where they may or may not travel. Road trains aren’t going anywhere as long as Australia maintains its low population density and needs to haul goods to and from distant rural and regional areas.