When is it appropriate to use high beams while driving a truck?

Using high beams while driving a truck is appropriate when there is no oncoming traffic and in poorly lit areas. High beams significantly enhance visibility by illuminating a larger area and making it easier to see hazards, other vehicles, and road conditions ahead. This is particularly useful in dark areas where street lighting is inadequate, allowing drivers to better assess their surroundings and respond to any potential dangers.

It's important to switch to low beams when encountering oncoming traffic to avoid blinding other drivers, which is why high beams are not recommended in heavy traffic situations. Additionally, using high beams during the day does not necessarily improve visibility for the driver themselves and is also unnecessary since natural light typically provides sufficient visibility. In construction zones, it’s generally more prudent to use low beams due to the presence of workers and equipment that may be sensitive to bright lights. Thus, the most suitable time for high beam usage is indeed in the absence of oncoming traffic and when traveling through poorly lit areas.