City of Sao Pulo recently introduced the law of ‘visual pollution’ banning billboards from the streets. It was discussed that every billboard can distract driver for 15 meters, causing great risks in traffic.
So, what is other place where lots of people travel and have enough time to consume commercials? Well, its metro. Metro cars have small screens with non stop video commercials.
Here you can also here an audio drive-trough one of the stations of LINHA VERDE (green line) at Sao Paulo metro.