ABC Online | How heat affects roads, trains and planes ABC Online Roads can melt, train tracks do expand and, when temperatures are high enough, the book on how to fly some planes literally hasn't been written. This is how heat can affect the three modes of transport we depend on most. Roads. They could melt. The ... Heatwave Hits Australia's South East: Road Melts, People Flock to Beaches It's So Scorching Hot In Australia Right Now A Highway Has Melted Hot road surface melts on the Hume Highway |