What is the purpose of a speed limit sign?

The purpose of a speed limit sign is to inform drivers of the maximum legal speed for a particular stretch of roadway. This legally enforced limit is established to ensure safety on the road, taking into account factors such as traffic patterns, road conditions, and the surrounding environment. By knowing the speed limit, drivers can make informed decisions to travel at a speed that is not only within legal boundaries but also suitable for the safety of themselves and others sharing the road.

Other options do not accurately reflect the function of speed limit signs. They do not merely suggest a speed or guide drivers to drive faster; rather, they are regulatory signs that must be adhered to. Additionally, while speed limits can be influenced by safe driving conditions, the primary role of the sign is to enforce a maximum speed and not to indicate dynamic conditions.