What speed do slow-moving vehicle signs indicate?

Slow-moving vehicle signs are specifically designed to alert drivers that a vehicle is traveling at a reduced speed on the roadway, typically due to the vehicle's shape, size, or the type of work it is engaged in. The correct understanding is that these signs indicate a speed of 25 miles per hour or less. This is significant for maintaining road safety, as other drivers may need to adjust their speeds accordingly to avoid collisions or other hazards.

The 25 miles per hour threshold is universally recognized to allow for ample response time for drivers who may be traveling at higher speeds, ensuring they can safely navigate around the slow-moving vehicle. In contrast, options indicating slower speeds such as 15 miles per hour or 30 miles per hour do not align with the established standards for slow-moving vehicle signage. Thus, the correct answer highlights the standard speed limit associated with these warning signs.