The only thing to remember is that road trains are like supertankers — they take a long time to reach cruising speed, a long time to stop and they don't give way to anyone.
So it's kind of exciting to encounter one of these 50 m (160') monsters on a one-lane road.
You can't drop your nearside wheels on to the gravel, as you can with other traffic. You have to get right off the nail file of bitumen and stop. Or become a hood ornament. The choice is yours.