When is it necessary to use high beams while driving?

Using high beams while driving is necessary when there is no oncoming traffic and it is dark. High beams provide greater visibility by illuminating a larger area of the road ahead, which can be particularly beneficial in rural or poorly lit areas where streetlights are absent. This improved lighting allows drivers to see further down the road, making it easier to spot pedestrians, animals, or obstacles.

In contrast, high beams should not be used in foggy conditions, as the light can reflect off the fog and create glare, making visibility worse. During daylight hours, low beams are generally sufficient since natural light is usually adequate for driving. Similarly, in urban areas, the presence of streetlights and other vehicles makes high beams unnecessary and could disturb other drivers. Therefore, the correct situation to use high beams is indeed when it's dark and there are no oncoming vehicles, ensuring safe driving practices while maximizing visibility.