What is the purpose of an end-of-queue warning sign?

The purpose of an end-of-queue warning sign is to alert drivers to the presence of stopped or slowed traffic in the work zone. This sign plays a crucial role in maintaining safety and efficiency within work zones by informing motorists that they might encounter vehicles that are not moving or moving at a reduced speed. By providing this advanced warning, drivers can adjust their speed and driving behavior accordingly, helping to prevent collisions and ensuring smoother traffic flow in and around the work area. The focus of this sign is specifically on the immediate driving conditions that may pose a hazard, rather than providing information on the start of a construction zone or guiding drivers to alternate routes.