When it is difficult to see and you are traveling near other drivers, what should you do?

At dawn, dusk, in rain, or snow, you need to make yourself easier to see. If you are having trouble seeing other vehicles, other drivers will have trouble seeing you. Turn on your lights, use the headlights, not just the identification or clearance lights. Use the low beams: high beams can bother people in the daytime as well as at night. [Commercial Driver Handbook]