What is the purpose of traffic signs?

Traffic signs serve the critical purpose of providing information and guidance to drivers on the road. They convey essential messages regarding traffic rules, road conditions, directions, and hazards, ensuring that drivers can make informed decisions while navigating. By displaying important signals such as speed limits, stop commands, and lane usage, traffic signs enhance safety for all road users and help maintain an orderly flow of traffic.

The other options either limit the function of traffic signs to specific audiences or imply a negative purpose. Signs that signal pedestrians only do not encompass the complete role that traffic signs play in overall road safety. Creating obstacles for speeding vehicles does not align with the intended function of traffic signs, as they are meant to guide rather than obstruct. Lastly, while some signs may denote shopping areas, this is only a small part of their broader function. Thus, option A accurately reflects the comprehensive role of traffic signs in promoting safe and efficient driving practices.