Mirror checks should be done: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question Mirror checks should be done: Answers Frequently as a part of your normal routine. Only when turning. Only when changing lanes. Infrequently, because they take your eyes off the road ahead. Explanation Frequent mirror checks should be part of your normal searching routine. Additionally, make a special point of using your mirrors before changing lanes, when stopping at an intersection, and before slowing down.