2016 worst traffic

Istanbul, with its bridges connecting Asia and Europe, has the world's second-worst evening rush hour.

TomTom says a journey that would normally take 30 minutes in free-flowing traffic requires just under an hour during evening peak times.

But that's actually an improvement over the previous year. To help ease traffic, the city has built a rail tunnel under the Bosphorus, and expanded its metro network.

"They've been doing massive investment in new infrastructure," Cohn said.

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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