work ahead street district heating pipeline reconstruction site with sign and fence as road barricade

adversity advertisement ahead alert arrow asphalt attention barricade barrier beware boundary caution city closed construction danger detour digging district diversion end equipment fence forbidden gravel heat industry information lane line maintenance marking net obstacle orange outdoor paving pipe pipeline post precaution reconstruction red repair repairing reparation restriction road roadblock roadside safety sand security sign signal site stop street striped symbol system temporary tool town traffic transportation travel triangle triangular unavailable under urban warn warning way white work yellow