City signs reading "buses only" and "no smoking". Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3295557/free-photo-image-banister-brown-background-busFree Image from public domain licenseSorry temporarily closed shop sign https://www.rawpixel.com/image/2325998/premium-photo-image-advertise-advertisement-backdropView licenseNo diving sign on a boat at Puolo Bay, Italy https://www.rawpixel.com/image/1198375/prohibited-diveView licenseNo diving sign on a boat at Puolo Bay, Italy https://www.rawpixel.com/image/1198355/prohibited-diveView licenseNo diving sign on a boat at Puolo Bay, Italy https://www.rawpixel.com/image/1198310/prohibited-diveView licenseNo diving sign on a boat at Puolo Bay, Italy https://www.rawpixel.com/image/1198308/prohibited-diveView licenseNo smoking sign on a blue wall https://www.rawpixel.com/image/560500/smoking-sign-blue-wallView licenseStop street sign vector illustration https://www.rawpixel.com/image/476203/free-photo-image-traffic-sign-stop-warningView licenseWord No on a protest sign https://www.rawpixel.com/image/476196/free-photo-image-aggressive-angry-answerView licenseNo entry road sign vector illustration https://www.rawpixel.com/image/476046/free-photo-image-forbidden-entry-stop-signView licenseThe word "No" on a protest sign https://www.rawpixel.com/image/475880/free-photo-image-denial-aggressive-angryView license