Reflective mirror is also called convex mirror, wide-angle mirror, and turning mirror is mainly used for various curves and intersections, which can expand the driver's vision and detect vehicles on the opposite side of the curve as soon as possible to reduce the occurrence of traffic accidents; It is also used for supermarket anti-theft and monitoring the dead light.

The road reflector is composed of a reflector and two columns to place it. The main forms used are round, square, and rare oval, and there are two kinds of mirrors: one mirror and two mirrors. The reflector is generally convex. The round mirror is suitable for use when a wide field of vision is required in the longitudinal direction, and the square or oval mirror is suitable for use when a wide field of vision is required in the transverse direction. When one mirror cannot guarantee sufficient vision, use two mirrors.