Abstract: A flashing warning light apparatus (10) for warning motorists in oncoming traffic that an object such as a car is stopped near the highway ahead. The apparatus (10) includes a housing (24) with an array of lights (12) on the front and possibly also the rear faces. Sensors (14) front and back sense oncoming traffic. A switch (36) allows the user to cause the arrays of lights (12) to flash continuously or only when oncoming traffic is sensed. The device may be powered by the car battery through a cigarette lighter adapter (34), dry cell batteries (28) or a solar cell (44).