“Indicating to pass” is insane and needs to stop
Road trains are fucking massive. They take a long time to pass even if you break the speed limit by 20 km/h, and they obscure your view of the road quite substantially. It’s near impossible for a driver to safely pass a road train without the truckie’s assistance on some roads. The fact that drivers mostly know truckies will do this means they are less likely to attempt an unsafe overtake which could endanger both them and the truckie.
The article is about a agricultural spraying tractor. Those aren’t long and don’t drive long distances.