The active contour markers consist of two main parts: first, high-brightness LED active contour markers; second, the guide sign controller. It can clearly outline road contours in poor visibility conditions, indicating safe passage for pedestrians and vehicles, ensuring traffic safety. They can be installed at highway lane dividers, sharp turns, tunnel walls, and tollbooths, as well as on accident-prone sections with frequent rain. Particularly, installing them in tunnels can significantly reduce tunnel operation and management costs, ensuring safe travel.