The stringent tobacco laws in Singapore are effective.

Is education and mindset that matter. I was impressed by the people in one of the countries I visited. They smoke at open space and threw the cigarette butts in their personal pouch or smoke at indoor smoking room, which located at the corner of the mall/hotel. They will automatically dismount and push their bikes at restricted areas such as traffic lights and certain pedestrian path. In Singapore, cyclists will just ride through.