Most congested cities in the North America 2018

Travel times in Mexico City are 52 percent longer during heavy traffic times, making it the most traffic jam prone city in North America. While this figure refers to additional average travel time throughout the day, on average, evening peak times make travelling by car 82 percent longer. The West Coast has the most congested cities for the United States and Canada as well, namely Los Angeles and Vancouver, respectively.

Effects of traffic

Workers in the U.S. can spend, on average, some 24 to 30 minutes commuting to work, depending on the region. This can be longer in large cities, adding a significant time to people’s working days without increasing their income. Increased traffic also leads to a higher number of fatal crashes, all else being equal.

Pollution concerns

Transportation is also one of the leading contributors to carbon dioxide emissions, and traffic jams contribute to this by extending the time that cars are running. Local air pollution is also a concern, particularly in Mexico where almost 50,000 people died from air pollution exposure in 2017.

North America's most traffic jam prone cities as of 2018

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North America

Survey time period


Supplementary notes

TomTom used GPS data to compare travel times during the whole day and during peak periods to travel times during non-congested periods.
Includes cities with a population of 800,000 or over.
The figures are based on 2018 TomTom traffic data.

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