According to Forbes.com, the traffic in Atlanta is the absolute worst in the United States. Forbes analyzed the 75 biggest American cities, tracking traffic delays, travel times and how efficiently commuters use existing infrastructure. Forbes also based its rankings on the U.S. Census Bureau's 2006 American Community Survey and, for some reason, on information from the the Texas Transportation Institute.
After crunching the numbers., Atlanta was ranked worst, besting even perennial traffic leaders such as Los Angeles, Houston and Washington, D.C. Of Atlanta traffic, Forbes says, "Here, in the fastest-growing city in America, more people flood the roadways than the infrastructure can handle. Commuters spend 60 hours a year stuck in traffic, second only to those in Los Angeles. If that weren't bad enough, Atlanta is so spread out that only 29 percent of drivers get to and from work in less than 20 minutes, the third worst rate in the country, and 13 percent spend more than an hour getting to work, the fourth worst rate in the country. The local train system doesn't service the entire city, and thus fails to relieve the pressure."
Behind Atlanta from second to 10th are: Detroit; Miami; Orlando; Dallas; Tampa; Washington, D.C.; Los Angeles; Houston; and San Francisco.