What is the function of reflectors on the road?

The function of reflectors on the road is primarily to provide visibility and guidance during nighttime driving. Reflectors are designed to reflect the headlights of vehicles, making their presence known to drivers even in low-light conditions. This reflection enhances safety by helping drivers to see the road layout, including curves, lane boundaries, and edges, guiding them to stay within their lanes and maintain a safe driving posture. The brightness of reflectors in the darkness serves as a visual cue that enables drivers to anticipate road conditions and navigate effectively.

The other choices involve functions that are typically fulfilled by different road markings or signs. While speed limit signs inform drivers of the maximum permissible speed, they do not provide reflective guidance. Markings that indicate lanes and road edges are often painted lines rather than reflectors. Similarly, signaling for merging into traffic usually involves signs or traffic signals rather than reflectors. Therefore, reflectors serve a unique and critical purpose in enhancing visibility for nighttime driving.