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L.A.'s Traffic: Most Congested In North America. Again!

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Drivers who suffer L.A.'s traffic gridlock, this won't seem like news to you: Los Angeles has been ranked as the number one city in North America when it comes to traffic congestion.

The Congestion Index ranking comes from TomTom and their analysis and charting of real travel times, and what they call "the most accurate and comprehensive barometer of traffic congestion in major cities all over the world."

A bit about their methodology:

The methodology that is used in this report compares travel times during non-congested periods (free flow) with travel times in peak hours. The difference is expressed as a percentage increase in travel time. We take into account local roads, arterials and highways. All data is based on actual GPS based measurements and for each city the sample size is expressed in total number of measured kilometres for the period.
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Following in Los Angeles' bumper-to-bumper tire tracks are Vancouver (2), Miami (3), Seattle (4), and Tampa (5). And, hey, be proud: We were ranked number one in North America last year, too!

However, in another recent ranking, while we came in second to Honolulu when it comes to how much time we spend stuck in traffic, we also are home to almost half of the 10 worst traffic corridors in the country.

We've got a brief look at some of the data for all North American cities, and for Los Angeles.