Hazard Deformation of crash barriers
Knowledge and understanding
|Deformation of crash barriers||
Understand all associated hazard knowledge
Crash barriers on roadways, also referred to as safety barriers, are designed to prevent vehicles from crossing from one carriageway to the other and to prevent vehicles from impacting or entering roadside hazards, for example bridges, signs or embankments. Crash barriers are also intended to absorb some of the energy from the impact of the vehicle and to redirect the vehicle along the line of the crash barrier so that it does not turn around, turn over or re-enter the stream of traffic; this is termed containment.
Several types of barriers are used on the roads in the UK, each of which performs differently on impact. Crash barriers can either be flexible, such as a steel wire rope or a steel beam, or rigid, with concrete barriers.
Damaged crash barriers, especially if they incorporate high tensile (H-T or HT) wires or ropes, may present hazards including sharp metal or impact injuries. Unless unavoidable, high tensile wires or ropes should not be interfered with or cut. Exceptions could include performing a rescue or if there are concerns that the barrier may fail.
Personnel should be aware that a vehicle coming to a position of rest on a crash barrier will present additional considerations when stabilising it. The barrier itself may also present a stability hazard.