Question When driving, how often should you check your rearview mirror for traffic behind you? Answers Every two to four seconds Every four to six seconds Every six to eight seconds Every eight to ten seconds Explanation Every six to eight seconds, you should look at your rearview mirror to check on the traffic behind you. Pass your DMV Written Test with flying colors Take me to the cheat sheet Wisconsin This questions appears in the following tests: Wisconsin Practice Test 15 Wisconsin Practice Test 18