South Australia · Learner's Theory Test · Road rules

You are driving at night with your headlights on high beam. When must you dip them to low beam?

The answer

Within 500 metres of any other vehicle
Only when the other driver flashes their lights
Only in built-up areas
Within 200 metres of an oncoming vehicle, or of a vehicle you are approaching from behind Correct

Why that's the answer

You must dip your headlights within 200 metres of an oncoming vehicle and within 200 metres of the rear of a vehicle you are following, so you do not dazzle the other driver.

Where this rule comes from

Department for Infrastructure and Transport – The Driver's Handbook Official source

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