Question Flashing hazard lights may be used: Answers When your vehicle is stopped or disabled on the highway or shoulder. When rain decreases visibility. When driving at night. In heavy traffic. Explanation Flashing hazard lights must only be used if your vehicle is disabled or legally stopped on the highway or shoulder. They may also be used when driving in a funeral procession. Pass your DMV Written Test with flying colors Take me to the cheat sheet Florida This questions appears in the following tests: Florida Practice Test 12 Florida Practice Test 11