Some cities are notorious for extreme traffic jams. Find out which city is the most traffic-congested city in North America.
TomTom today announced the results of its latest Congestion Index, which measures traffic congestion in North American cities between July and September 2012. The third Congestion Index examines the congestion in 57 metropolitan areas with a population of more than 950,000. Take a look at the top 10 worst cities for traffic-congestion.
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