When is a slow-moving vehicle placard necessary?

A slow-moving vehicle placard is necessary when traveling on a public road because it serves to alert other drivers that the vehicle is not capable of maintaining typical speeds found on highways, which is generally defined as vehicles that can only operate safely at speeds of 25 miles per hour or less. The use of this placard is crucial for road safety; it increases visibility and helps reduce the risk of accidents by informing faster-moving traffic of the potential hazards posed by slower vehicles.

In contrast, a slow-moving vehicle placard is not typically required for operations conducted solely within a warehouse, construction site, or designated parking areas, as these are usually controlled environments where interactions with high-speed traffic are not a concern.