Drivers should use their high beams at night:

When driving in fog.
When following other vehicles.
Only if it becomes necessary.
Unless oncoming traffic is approaching.
Explanation

High beams let you see twice as far as low beams. However, high beams can also be blinding to oncoming drivers, making it difficult for them to see and potentially causing an accident. It is important to dim your high-beam headlights for oncoming traffic and when approaching a vehicle from behind.

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