Impact attenuator

An impact damper is a passive protection device usually made ​​of metal ( steel), but also of plastic. Crash cushions are designed to reduce the severity of head-on or offset some accidents. They are used when danger spots ( non-deformable obstacles such as bridge piers or noise barriers) are between major and minor roadways and at motorway junctions at the beginning of the guardrail or concrete barrier.

Chance of security vehicles are used with crash cushions at the stern for securing worksites.

Operation

Crash cushions are made of air, water or sand pads or components, the plastically deformed by the impact. The impact energy is absorbed by the shock absorber.

The requirements for crash cushions are in the EN 1317 Rear Road restraint systems - Part 3: Crash cushions - performance classes, defined acceptance criteria and test methods for impact test.

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