Water horse (also known as water code) is a plastic shell obstacles used to divide the road or form a barrier, usually on the small down big structure, the top has a hole to inject water to increase the weight (so called water horse, note: can not be filled with water wooden or iron movable obstacles known as refusal of the horse), part of the water horse also has horizontal holes so that through the rod connected to the formation of a longer chain of blocking or blocking the wall.

Generally used for road traffic facilities, in the highway, city roads, and flyovers street intersections are common.