hazard lights
From Longman Dictionary of Contemporary EnglishRelated topics: Motor vehicleshazard lightsˈhazard ˌlights noun [plural] TTCspecial lights on a vehicle that flash to warn other drivers of dangerExamples from the Corpushazard lights• He put on his hazard lights, pulled over and pushed his way across the crowded pavement towards the rubbish basket.• Christopher Smythe, defending, said hazard lights on Mrs Bone's car may have been obscured as she changed the wheel.