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Billboards are meant advertise products,ideas,locations,etc.
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Last measured it was about half a million or 500,000. Billboards are by now closer to One million nationwide.
A good company is Advertising Higher. There are also several other companies that offer Electronic Billboards.
The most popular city in he US is New York City.
It is the 4th largest US City by population.
Signs or billboards
Philadelphia was the capital city of the US during most of the Revolutionary War.
There are few "Baby Panay Billboards". They can be found on roads, on Panau City's rooftops and at some airports. There is an easter egg connected with them. You can use grapple hook to get close to billboards and then press action buton to paint some funny details on those billboards.
New York City has the highest population in the United States.
Most popular us city is New York City