Final answer:
High beam headlights should be used in open country driving on dimly lit highways, but not during snow storms, rain storms, or foggy weather.
Step-by-step explanation:
Drivers should use the high beam headlights when driving on dimly lit highways in open country areas, especially at night. This helps to improve visibility and see any obstacles or potential hazards on the road.
Using high beam headlights is not recommended during snowstorms or rainstorms as the bright light can reflect off the precipitation and impair the driver's vision.High beam headlights should also not be used when it is foggy as the light reflects off the water droplets in the air and can actually reduce visibility. In foggy conditions, drivers should use low beam headlights or fog lights to enhance visibility.