SEKERHETSANORDNING FOR SNETT I MARKEN INFORDA LEDRECKSENDAR

摘要

The end of a roadway guard rail which is spaced above and extends generally parallel to the ground is rigidly secured to a rigid beam at least 25 m long having a far end sunk in the ground and supported between its ends by a plurality of vertically compressible posts. The beam may be a metal shell filled with synthetic-resin foam. The posts may be provided internally with shock absorbers, or with springs, or may be made of sheet metal with a synthetic-resin core. In any case the posts are vertically compressible so as to absorb the kinetic energy of a vehicle colliding with the beam in order to slow the vehicle down without flipping it over. The upper surface of the beam is provided with a friction layer that further aids in slowing down a colliding vehicle.