Question When checking your mirrors: Answers The passenger side mirror should not be used. The driver's side mirror should not be used. Mirrors on both sides of the vehicle should be used. Explanation Regularly check mirrors on both sides of your vehicle while driving. It is important to be aware of what is happening behind and to the sides of your vehicle. This questions appears in the following tests: Idaho Class A Knowledge Test New Mexico Class A Knowledge Test New Mexico Class B Knowledge Test Oregon Passenger Vermont Tank Wyoming Class B Knowledge Test