Flash your headlights
Use the same rule as for passing motorized vehicles in almost all instances.
1
It could for emergencies, or for passing other vehicles on the road. It may also be based on the dynamics of gasoline driven engines.
When there are no vehicles are in the way, or in the lane ou are trying to pass in. Passing is not permitted on solid double lines.
on the center of the road
It means that you cannot pass any vehicles in that zone. It can also signify that the passing zone has ended.
Heavier vehicles and vehicles traveling in combination with other vehicles have
Traffic
It is so as it can be straight in the mirrors of all the passing vehicles.
It is about 440km from Alice Springs to Uluru (Ayers Rock) by road. The roads are straight but the shoulders can be soft and dusty, so drivers need to be careful when passing other vehicles. Allow an absolute minimum of five and a half hours for the journey.
When signaled by a Police Officer or as required for passing emergency vehicles.
to travel by standing on the side of the road and soliciting rides from passing vehicles.