This product is a rectangular delineator with both reflective warning and direction guidance functions, available in single-sided and double-sided styles. It is a core guidance sign for expressways, garages and various roads, designed to improve traffic safety in complex road conditions. The main body is made of high-strength engineering plastic or metal, with a stable and durable rectangular structure. It has excellent wind load and impact resistance, can withstand complex outdoor environments such as sun, rain, high and low temperatures for a long time without aging or deformation, and is easy to install, which can be flexibly fixed on guardrails, road sides or garage walls. The core part is equipped with high-refractive-index reflective film: the single-sided version is suitable for warning the boundary of one-way roads, while the double-sided version can provide reflective guidance for two-way lanes at the same time. At night or in low-visibility environments, it can efficiently reflect vehicle lights to form a clear rectangular light band. It not only clearly outlines the road contour, but also guides vehicles to drive along the correct route through orderly arrangement. Especially in scenarios such as expressway curves, ramps, tunnel entrances and exits, as well as garage forks and channel corners, it can accurately convey direction information, help drivers quickly identify the road direction, avoid deviating from the lane or taking the wrong route, effectively reduce the risk of traffic accidents, and provide stable and reliable guidance guarantee for various road traffic.