Question Massachusetts law requires headlights to be used: Answers When the driver is tired. During the day in favorable weather conditions. When driving in tunnels. When the temperature drops below freezing. Explanation Massachusetts law requires that your headlights be on when you are driving in a tunnel. Headlights can help increase visibility in situations with normally lowered visibility. Pass your DMV Written Test with flying colors Take me to the cheat sheet Massachusetts This questions appears in the following tests: Massachusetts Practice Test 5 Massachusetts Practice Test 13