At a minimum, what speed must be maintained on a public road where a Slow Moving Vehicle (SMV) sign is displayed?

A Slow Moving Vehicle (SMV) sign indicates that a vehicle is designed to travel at slower speeds, typically no more than 25 mph. The law generally requires that on public roads, these vehicles must not operate at speeds greater than 25 mph to ensure safety for both the slow-moving vehicle and faster-moving traffic. While the choices provide various speed limits, maintaining a speed of 15 mph aligns with the common regulations surrounding SMV signs, ensuring that the vehicle is still operable while minimizing risk to others on the roadway. This speed allows sufficient visibility and reaction time for other drivers, who may need to adjust their own speed or lane positioning in response to the slower vehicle. Thus, operating at a speed of 15 mph when displaying an SMV sign adheres to safety standards for sharing the road.