How would you indicate with hazard lights on? They are meant to be used only when you are stationary and a danger to oncoming vehicles. DO NOT use hazards while moving.

For fog, use fog lights. If your vehicle isn't equipped with fog lights, use headlights (low beam). Be extra careful. Turn off the stereo, ask kids to behave, etc....

PS: Foggy days are not over. There are always chances of some foggy mornings to March.