Washington, D.C. tops the list of gridlock-plagued cities, with 82 hours of delay per commuter, followed by Los Angeles (80 hours), San Francisco (78 hours), New York (74 hours) and San Jose, Calif. (67 hours).
Report: Honolulu has worst traffic gridlock in U.S.
Overall, traffic congestion in the U.S. dropped 30% in 2011, according to an annual report, which cites high unemployment and high fuel prices as contributing factors.