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World's 10 worst cities for traffic

Find out if your city has the most congested streets in the world.

8.  Rome

most congested cities

Rome is considered by many visitors to be the most beautiful, historic city in the world.

But it's also got a serious traffic problem due to the density of the city and narrow streets, and the situation has deteriorated steadily in recent years.

"Rome has a public transport network, but it's challenged by a very old street network that wasn't necessarily built for cars," said Cohn.

Source: The TomTom Traffic Index
The TomTom Traffic Index is based on real travel time data captured by vehicles driving across the entire road network. TomTom's traffic database contains over nine trillion data measurements. The Traffic Index compares travel times during non-congested periods with travel times during peak hours. Cities with the highest rankings in the index experienced the sharpest increases in travel times between non-congested periods and peak periods. Cities in Asia were not included in the index due to insufficient data.
  @AlannaPetroff - Last updated January 03 2014 11:06 AM ET

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