US metropolitan areas with most congestion, measured by wasted hours in peak-hour traffic

Metropolitan areas with most traffic congestion

Some of the most congested metro areas in the nation, according to the Texas Transportation Institute. Listed are the average number of hours drivers waste in peak-hour traffic delays per year. Nationally, drivers wasted an average of 36.1 hours in 2007, down from 36.6 hours in 2006 and a 25-year high of 37.4 hours in 2005.

Source: Texas Transportation Institute