highway portal with speed detection and fog signaling up to the city of ospitaletto in italy

a4 autostrada autostradale banchi banner billboard cartel check dangerous nebbia dust fine fog bank fogbank foggy freeway gate gateway haze highway italia italian italy journey low visibility mist mistiness mists misty motorway notice ospitaletto panel patchy police portal poster road signs safety sign signboard specs speed camera control steam system tour tourism tourist traffic travel traveling travelling trip tutor val padana voyage