Other drivers may sometimes flash their headlights at you. In which situation are they allowed to do this?

A: To warn of a radar speed trap ahead

B: To show that they're giving way to you

C: To warn you of their presence

D: To let you know there's a fault with your vehicle

If other drivers flash their headlights, this isn’t a signal to show priority. The flashing of headlights has the same meaning as sounding the horn: it’s a warning of their presence.

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