site sign with italian text which means no entry for non-workers behind orange protective netting

alt billboard billboards building site yard construction danger dangerous dangerousness florence genoa halt hand hazard hazardous infrastructure italian italy jeopardy language milan naples trespass orange netting palermo peril perilous personnel pisa protection network restricted risk risky rome safety net signage signal stop text treacherous turin unauthorized verona warning word work entry vietato non addetti lavori