What does a reflective orange triangle on a vehicle indicate?

A reflective orange triangle on a vehicle indicates that the vehicle is a slow-moving vehicle. This symbol is an essential safety feature designed to alert other drivers that the vehicle is traveling significantly below the normal speed limit, typically 25 mph or less. This is particularly important in environments where highway speeds are much higher, as it helps prevent accidents by warning approaching drivers to proceed with caution.

This marking is primarily used by agricultural vehicles, construction equipment, and other non-motorized vehicles such as those being towed. It is crucial for drivers to recognize such signals so they can adjust their speed and maintain a safe following distance. Notably, the other choices do not represent the meaning of the reflective orange triangle: construction vehicles might have different markings, police vehicles typically use flashing lights, and while an out-of-service vehicle may have various indicators, it does not specifically use this reflective triangle.