The GW is considered one of the world's busiest bridges in terms of vehicle traffic; In 2004, the bridge carried 108,404,000 vehicles, with current AADT estimates of nearly 300,000 vehicles daily. This number is similar to that of the San Francisco-Oakland Bay Bridge. The GW span is the fourth largest suspension bridge in the U.S as of 2006.
Thanks to shedwa for the submission! You should check out his blog for New York commentary and pictures of cool ads, like this one: