The Gregory Highway is a state highway in Queensland that serves the major coal-mining centres of Central Queensland. The highway was named after Augustus Gregory, an early explorer.© Wikipedia
We towed our caravan along the Gregory Developmental Road from Lynd Junction to Clermont in outback Queensland. This is a very good road with only a few stretches of single width - signs ask you to have your UHF tuned to channel 40 so that heavy vehicles can warn oncoming traffic when they are approaching a call point. These call points can be single lane bridges or tight bends on a single width section of the road.
When a road train approaches from the opposite direction (on single width sections) we would indicate and pull off the sealed road to allow the truck to pass. This is common practice in the outback as it helps to avoid damage from rocks being flicked up by the truck's tyres. We were very apprehensive before our trip about travelling on these Developmental Roads - we did not have a problem.