I just spent 6 days in the city of Singapore, which is also called “fine-town”. There are very strict rules to keep this city state running, safe and clean.
I never saw as many “NO“ signs. No smoking, no eating, no drinking, no drugs, no littering, …. Basically no everything except at designated areas. Even chewing gums are forbidden by law in this country! To avoid people spitting them on the floor. This is what I call solving a problem from the root. There is absolutely no trash on the floor. Neither inside, nor outside. You could probably have a surgery anywhere without any risk of infection.