Abstract: The invention concerns a damping separator element for producing delimiting or protective barriers, for example for road traffic lanes or motor sports tracks. The element includes an elongated horizontal section and a cover, preferably made of flexible plastic material. The central reinforcement or hollow core, preferably made of metal, produced in the form of a flattened sheath and extended from one end to the other of the element, is housed inside the cover. The reinforcement provides a space between the cover and the central flattened hollow reinforcement, the space being filled or to be filled with a plastic foam such as, for example, a polyethylene foam.