Patent ID: 7287930

Claim:
A vehicle impact attenuator comprising: a shock absorber that deforms upon a collision of a vehicle to thereby reduce the impact on the vehicle; a support for the shock absorber; and a holding portion that holds the support in a vertical position in an installation area; the support or the holding portion having a release portion that fractures upon application of a load equal to or exceeding a set value, to thereby release the support from being held in a vertical position in the installation area, the support being plastically deformable by a load lower than the set value, the support being a pipe-like member which has an outer diameter of 114.3 to 318.5 mm and a wall thickness of 1.6 to 20 mm, the plastic deformation occurs as a flattening of the pipe-like member, and the yield point load that causes the flattening as the plastic deformation of the support being not less than 25 kN and not more than 800 kN.