While driving, your mirrors: Question While driving, your mirrors: Answers Should not be used. Should only be used when changing lanes. Should be checked regularly. Explanation While driving, regular mirror checks are essential to remaining aware of the traffic around you. Mirrors are also essential to helping you spot possible problems on your own vehicle. This questions appears in the following tests: Minnesota Class A Knowledge Test Mississippi Class A Knowledge Test Mississippi Passenger Nebraska Class A Knowledge Test Nebraska Class B Knowledge Test New Jersey Tank South Dakota Class A Knowledge Test