pole of a permanent forsvagade with lots forsedd halprofil of metal

摘要

PCT No. PCT/SE84/00101 Sec. 371 Date Dec. 4, 1984 Sec. 102(e) Date Dec. 4, 1984 PCT Filed Mar. 21, 1984 PCT Pub. No. WO84/04117 PCT Pub. Date Oct. 25, 1984.A post, for traffic signs, lighting and the like has a polygonal shape, with essentially rigid sides. The sides situated at right angles to oncoming traffic have attentuated portions therealong. When an oncoming vehicle strikes the post, the attentuated portions break, greatly reducing the strength of the remaining sides.