What do regulatory signs provide notice of?

Regulatory signs are crucial components of traffic control, as they provide information that governs the behavior of drivers and pedestrians on the road. These signs inform individuals about the rules and regulations that must be followed to ensure safety and smooth operation within the transportation system. For example, signs indicating speed limits, no entry, stop, yield, and other essential traffic laws serve as directives that must be obeyed. Understanding these regulations helps prevent accidents and maintain order on the road.

In contrast, the other options relate to aspects of driving that do not directly convey legal requirements. Traffic patterns and flow pertain to the movement of vehicles rather than the laws that govern them, while road closures and detours provide information about current temporary conditions affecting travel routes. Weather conditions may impact driving but do not constitute regulatory instructions.