high visibility clothing must be worn

alert alertness amp area attention backgrounds beware blue care careful caution cautious circle clothing communication compulsory control cut danger dangerous design employees equipment essential hazard hazardous health high icon illustration important industry information jacket label law legal mandatory necessary notice obligatory order out people peril personal persons ppe protect protection protective reflective regulations required requirement risk risky safety sign signs strips symbol symbols threat vector vest vigilance vis visibility warn warning wear white work workers working workplace