What is the primary purpose of road signs?

The primary purpose of road signs is to provide information and instructions to drivers, which contributes significantly to road safety and effective traffic management. Road signs communicate essential information such as speed limits, warnings about upcoming hazards, directions, and regulations governing road use. This information is crucial for helping drivers make informed decisions, navigate safely, and understand the rules of the road. Effective communication through road signs aids in preventing accidents and ensures that traffic flows smoothly, thus maintaining order on the roadways.

The other options do not align with the fundamental role of road signs. For instance, road signs are not meant to decorate roads; their design is functional rather than aesthetic. Similarly, road signs do not aim to increase driving speed or confuse drivers; instead, they are designed to enhance safety and clarity in driving conditions.