Protective device for the guardrail beams of the traffic lanes, of the type comprising a pair of hollow bodies (2) of prismatic configuration and "C" section, preferably made of plastic material, coupled together, and intended to position in a confronting manner covering the perimeter of the beams to be protected (4) to cushion the impact of the blows, and which are held together by fixing elements (3) mounted through through holes (22) located in opposing positions in two hollow bodies (2); characterized in that it comprises hollow interior parts (1) of semicylindrical general configuration with a longitudinal channel (11) that allows them to be positioned facing each other, covering the perimeter of a section of the beam to be protected (4); arranging the hollow outer bodies (2) of both internal recesses (21) for the fitted housing of said hollow interior parts (1), forming the assembly a device equipped with a double chamber whose presence contributes to increase the damping susceptible to be supported by said device before an impact. (Machine-translation by Google Translate, not legally binding)
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