What is the difference between double flashing and quadruple flashing?

[VanKhloe]

Double flashing is the same as quadruple flashing; they refer to the same concept. Hazard lights, emergency flashers, and warning lights are all the same type of light. The following situations require the use of hazard lights: When temporarily parked: When temporarily parked, hazard lights must be turned on, and in some cases, a warning sign must also be placed. If the vehicle is temporarily stopped to wait for someone or pick up items, the hazard lights should be activated to alert others that a vehicle is present. When towing a malfunctioning vehicle: Both the malfunctioning vehicle and the towing vehicle must turn on their hazard lights; otherwise, they may face penalties such as fines or demerit points. In this situation, failing to activate the hazard lights can prevent trailing vehicles from understanding the towing vehicle's status, increasing the risk of accidents.