Use of vehiclesQuestion #14719
When must a driver switch on the hazard warning lights?
Explanation
Hazard lights are required in a few clearly defined situations. Turn them on if you are forced to stop where stopping is banned, after a crash, or when oncoming headlights dazzle you, along with the other cases listed in the rules. They warn everyone else of the danger.
KET reference: KET 91: hazard warning lights, if fitted, must be switched on when: 91.1 you are forced to stop where stopping or parking is forbidden; 91.2 a crash has occurred; 91.6 the driver is dazzled.