construction site sign with the writing in italian which means entry to non-workers prohibited for the safety of persons

advertisement advice area astriction barred billboard building site cement classified close closed closing construction engineering forbidden infrastructure ingresso vietato inhibition interdiction manufacturing message non addetti lavori notice offish offishness pictogram private zone prohibition project reserved restricted restriction risk road signs safety security sign signal signals signboard stop symbol taboo traffic warning italian language entry unauthorized personnel people workers danger accident prevention protection regulation law compliance responsibility