Updated: December 4, 2013 2:00 PM | By MSN Autos
North America’s worst cities for traffic

Which cities have the worst gridlock? TomTom counts them down



Traffic is that great pest that unites us all (© Photo: Digital Vision, Getty Images)
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  • Traffic is that great pest that unites us all (© Photo: Digital Vision, Getty Images)
  • Montreal Canada (© Photo: Image Broker, Rex Features)
  • New Orleans, USA (© Photo: Anne Rippy, Getty Images)
  • Washington, D.C. (© Photo: Bloomberg via Getty Images, Getty Images)
  • San Jose, USA (© Photo: Ocean/Corbis)
  • Toronto, Canada (© Photo: Henry Georgi, Getty Images)
  • Seattle, USA (© Photo: Mel Curtis/Getty Images)
  • San Francisco, USA (© Getty Images)
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There are few things in life that are universally abhorred, but traffic is that great pest that unites us all, infuriating small town drivers and big city motorists all the same.

Where, though, are tempers running highest? With data from GPS maker TomTom, which compiles an ever-updating list of the most congested roadways in North America, here are the continent's 10 worst cities for traffic.

* Each city is awarded a Congestion Index score by TomTom as a percentage. So, for instance, if City X’s Congestion Index is 15 per cent, it takes 15 per cent longer to travel through that city with a normal traffic load than it would if there were no cars at all to slow you down.

Video: Driver loses control after passing motorcycles
 

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