What is the primary purpose of signs in conjunction with signals?

The primary purpose of signs in conjunction with signals is to provide important information for drivers and pedestrians. Signs serve to convey critical messages that enhance traffic safety and ensure the orderly flow of traffic. They can communicate various types of information, such as warnings about upcoming hazards, regulatory requirements (like stop and yield instructions), and guidance on direction and routes.

While other options may touch on aspects of signage, they do not encapsulate the comprehensive role that signs play in traffic management and safety. For instance, indicating road construction times is a specific type of information but does not cover the broader spectrum of messages signs provide. Enhancing the aesthetic appeal of roadways is not a primary function of traffic signs, which are fundamentally designed for safety and direction. Lastly, while signs can indicate speed limits, managing speed limits is just one aspect of the wider communicative role that signs fulfill in conjunction with signals.