If you are driving in fog, you should not: Before you start the test, please answer the question below regarding your insurance status. Without insurance you will not be able to drive in Michigan Do you currently have car insurance? Yes I have insurance. Great, you're all set! Click here if you still want to compare rates. No, I need insurance. Click here to compare rates from our insurance partner. Question If you are driving in fog, you should not: Answers Turn on the four-way flashers. Slow down. Use your high beam lights. Explanation If you must drive in fog, be sure to slow down. Turn on your flashers and low beam headlights. This questions appears in the following tests: Connecticut Class B Knowledge Test Iowa Tank Iowa Tank Missouri Class B Knowledge Test South Carolina Class B Knowledge Test South Carolina Double Vermont Class A Knowledge Test