The visibility on a foggy highway is only 300–400MCD, however Road Stud‘s luminance can reach more than 2000MCD, or 6-7 times more than the visibility. At night, high-intensity lights may safely and effectively cut through rain and fog. Provide drivers with directions. Active lighting for road studs and dynamic warning The Road Stud dynamic warning function is extremely strong at night since human vision is more sensitive to changes and Road Stud flashes at a specific frequency. Road Stud active lighting not only completely avoids rain and fog interference, but also eliminates the need for vehicle headlights, increasing viewing distance and improving effect.