What is the primary purpose of a speed limit sign?

The primary purpose of a speed limit sign is to inform motorists of the maximum allowable speed for that particular section of the road. This regulation is crucial for maintaining safety on the roadways, as it provides guidance to drivers about how fast they should be traveling, depending on the surrounding conditions and the type of road. By adhering to the posted speed limit, drivers can reduce the risk of accidents, improve traffic flow, and ensure a safer environment for all road users, including pedestrians and cyclists.

While minimum speed limits exist on certain roads to prevent slow-moving vehicles from interfering with traffic flow, a speed limit sign primarily conveys the maximum speed that should not be exceeded. Additionally, it does not serve to encourage racing or indicate road conditions, as those functions are typically handled by other types of signs or signals.