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In an industrial setting, it may be a fence or window, designed to keep the operator away from moving parts or other hazards. In an automotive setting, it may be a Traffic barrier or Jersey Barrier, separating lanes/directions of traffic flow. Hard barriers are fixed or removable guards which prevent entry. Soft barriers are devices such as light curtains which detect the presence of a foreign body and are tied into the control circuit to stop the machine.
Work Safe Victoria (an Australian organization) defines a Safety Barrier as a device that:
- physically separate the work area and the travelled way,
- are designed to resist penetration of an out-of control vehicle, and
- have properties which redirect an out-of-control vehicle back on to the road away from the work area.
- "SWAT Bulletin" (PDF). SWAT Bulletin Number 4. Work Safe Victoria. Retrieved 12 June 2013.
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