When driving in fog, you should: Before you start the test, please answer the question below regarding your insurance status. Without insurance you will not be able to drive in Ohio 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 and I want to compare options. Question When driving in fog, you should: Answers Slow down. Speed up. Drive on the shoulder. Explanation It is best not to avoid driving in fog. However, if you must drive under foggy conditions, be sure to decrease your speed. This questions appears in the following tests: Alabama Class B Knowledge Test Alaska Double California Class A Knowledge Test Idaho Double Iowa Class A Knowledge Test Louisiana Class A Knowledge Test Louisiana Class B Knowledge Test Louisiana Double Maine Class B Knowledge Test Mississippi Double Montana Tank New Mexico Class B Knowledge Test Ohio Tank Ohio Passenger Rhode Island Class B Knowledge Test Washington Class B Knowledge Test Wyoming Class A Knowledge Test