Mexico City

2016 worst traffic

Mexico City is notorious for its terrible traffic. Things aren't getting better.

Cohn said the reasons for more congestion are economic: The capital is adding jobs, businesses and people.

The city is building more infrastructure, too. But it may have to encourage people to use their cars less.

"You can't just build away congestion," Cohn said. "You have to do more."

First published March 21, 2016: 10:03 PM ET
Source: TomTom Traffic Index 2016
The TomTom index is based on data from vehicles driving across each city's road network. The evening rush hour ranking is based on time added to a congestion-free journey of 30 minutes.

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