100 most congested cities in the U.S.
INRIX released a report of the 100 most congested cities in the U.S. The study reports that traffic congestion across the U.S. increased nearly 2 percent in 2007 over 2006.
Los Angeles, New York, and Chicago are the most congested cities, according to the study. The Portland-Vancouver (pdf) area is ranked 21, right behind the San Jose-Sunnyvale-Santa Clara area.