Found this article interesting. First ads go up on Chicago River bridge houses - WGN
Nearly a year and a half after then-Mayor Richard Daley floated the idea, the first corporate advertising has gone up on downtown Chicago River bridge houses.
The Bank of America banners were installed on the landmark limestone structures on the Wabash Avenue bridge this morning.
While companies have been slow to respond, the Emanuel administration is banking on as much as $25 million in revenue from corporate advertising on everything from building to the city's website to garbage cans and parking pay boxes.
A Bank of America spokeswoman said the company has agreed to a 30-day ad lease on the Wabash Avenue bridge houses, but declined to say how much money it would pay.