What does a speed limit sign display?

A speed limit sign displays the maximum speed allowed in that area. This regulatory sign is crucial for maintaining safety on the roads, as it informs drivers of the highest speed they may legally travel under ideal conditions. Following the displayed speed limit helps prevent accidents and ensures that vehicles can safely navigate the roads while considering various factors such as traffic, road conditions, and pedestrian activity.

While the other choices mention various types of speed measurements or suggestions, they do not accurately reflect the primary purpose of the speed limit sign. For example, a minimum speed limit would indicate the slowest speed permitted, which is not what a typical speed limit sign conveys. Likewise, suggested speeds for better fuel efficiency or average speeds of vehicles are not legally binding and do not indicate maximum speed limits. Therefore, the speed limit sign serves a specific function focused on establishing a maximum speed to promote safety on the road.