What does it mean when road signs are equipped with reflective surfaces?

Road signs that are equipped with reflective surfaces are specifically designed to enhance visibility, particularly during nighttime or in adverse weather conditions such as rain, fog, or snow. The reflective material bounces light back towards its source, making it easier for drivers to see and read the signs when headlights illuminate them. This feature significantly aids in safety by ensuring that important information (such as regulatory signs, warnings, or directional guidance) is noticeable when visibility may otherwise be compromised.

In contrast, other options suggest limitations or misinterpretations about the purpose of reflective surfaces. For example, while some signs may indicate hazardous areas, it is the reflective quality that primarily serves to enhance visibility rather than solely indicate danger. Additionally, the claim that they are only visible during the day disregards the essential function of reflection in low-light situations. Lastly, indicating that they are only for decoration overlooks their critical role in traffic safety and communication.