Animals that are not under the control of someone are not allowed on a public road or in a place where they might stray onto a public road. Herders often use country roads to move stock between paddocks.
People controlling animals on roads must carry a warning at least 150 metres ahead of and also beyond the herd as follows
Sunset to sunrise: a red light
Sunrise to sunset: a 300 mm square red flag
If there are not more than 10 animals, only one light or flag is required
If there are animals on the road:
follow any advice the herder may give you.
slow down or pull over to the side of the road
don't sound your horn or make a noise that could frighten the animals
Dogs may require separate attention. When you see a dog in the road slow down until you have passed the dog, then accelerate away.