Which of the following is true?

Headlights on vehicles must be turned on a half hour after sunset to a half hour before sunrise.
Driving with low beams on during the daytime reduces the risk of head-on collisions.
When visibility is poor, such as in fog, heavy rain, or heavy snow, drivers must use their low beam headlights.
All of the above.
Explanation

Studies have shown that driving with low beams on during the daytime can reduce the risk of head-on collisions by more than 20%. Using headlights from a half-hour after sunset to a half-hour before sunrise ensures that vehicles are visible to other road users and provides better visibility for the driver. Low beam headlights improve visibility during adverse weather conditions, such as fog, heavy rain, or heavy snow.

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