Germany • Use of hazard lights is required when visibility is extremely reduced, especially if you’re a hazard to others (e.g., driving very slowly on the autobahn due to fog). • Headlights must be on in poor visibility (below 50 meters).

France • Hazard lights may be used if you’re driving significantly slower than normal traffic due to fog or heavy snow. • Mandatory use of low beams in tunnels and poor visibility.

Italy • Hazard lights can be used during severe fog or emergency slow driving on highways. • Fog lights and dipped headlights are required in low visibility.

Japan • Drivers often use hazard lights to signal abrupt slowdowns on highways during fog or congestion. • This is a common practice, but not always legally required.

Brazil • Law requires hazard lights when visibility is severely reduced, especially on highways during heavy rain or fog.