Using high-quality ultra-bright LED as the light source of guardrail, high-strength imported PC material shell, through digital control signal transmission mode, there are red, yellow, green, blue, white, double-color, seven-color, full-color and other colors, which can achieve gradient, jump, color flicker, random flicker, gradient alternation, chasing and other changes. It has many advantages, such as reliable performance, complete functions, flexible control, strong system expansion, the simplest and stable power supply mode, the largest number of control lines, the fewest control lines, simple installation, low maintenance, good mixing effect, vivid color, energy saving and environmental protection.