What is the main purpose of a speed limit sign?

The main purpose of a speed limit sign is to inform drivers of safe driving speeds. Speed limits are set after considering various factors, such as road conditions, traffic patterns, and safety concerns. They provide drivers with crucial information about how fast they can safely travel on a particular stretch of road, taking into account the characteristics of the area, such as pedestrian activity, nearby schools, or residential neighborhoods. By adhering to speed limits, drivers help maintain safety for themselves and others on the road.

While there are other signs that may aim to encourage faster driving no speed limit implies higher speeds, restrict access to certain roads, or signal construction areas, the specific role of a speed limit sign is solely to guide drivers on the appropriate and safe speed for a given roadway.