What is the function of traffic signs with a red border?

Traffic signs that feature a red border are specifically designed to denote prohibitions or restrictions. This use of a red border effectively communicates to drivers that certain actions are not allowed in that area, such as stopping, parking, or entering a one-way street in the wrong direction. The red color, universally associated with stop or caution, is effective in drawing attention and prompting immediate compliance from drivers.

For instance, signs like "No Parking" or "Do Not Enter" utilize this design to highlight that specific behaviors are prohibited, ensuring safety and order on the roads. The presence of a red border is a visual cue that helps drivers quickly recognize rules they must follow to prevent accidents or legal infringements, thus playing a crucial role in traffic safety. This clear signal helps maintain the flow of traffic and reduces confusion on the road.