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Shallow focus of a newly installed multi function smoke detector and emergency lighting seen within a hospital corridor in Britain. Wards and nurse stations branch off the long corridor.
Numerous black and yellow radioactive barrels with hazard symbols stored indoors, used for containment of nuclear waste and hazardous materials – Waste management. 3d image
Fire hazard warning sign on a brick wall background
Bright yellow-orange flashing lights at a roadworks site in Germany at night. Warning lights with intense colours protect against accidents at obstacles and danger spots on the road. Selective focus.
Prohibitory sign on a vape, cigarette and electronic cigarette.

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