Drivers there spent an average of 104 hours being stuck in road congestion.
Overall, U.S. cities accounted for half of the firm's list of the top 10 most-congested areas worldwide, helped by cheaper U.S. gas prices and a buoyant economy, the report said. Lost productivity and fuel cost San Francisco drivers $1,996, and the city more than $2.5 billion in 2016.
But according to one recent study, none of those global cities has a traffic problem quite like Miami's.
Being stuck in traffic cost the average US driver $1,400 a year ago, for an overall total of $300 billion nationwide, Inrix said.
Los Angeles, which also ranked the worst city in the world, New York, San Francisco, Atlanta and Miami ranked higher than Washington on the most congested ranking for USA cities.
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Johannesburg has, however, experienced a 3% increase in traffic congestion since 2015 and now sits at a congestion level of 30%.
The only American city in the top 15 is Los Angeles.
"Congestion also costs our country hundreds of billions of dollars, threatens future economic growth and lowers our quality of life", Pishue said.
He recommends that governments use traffic data and technology to improve traffic flow as they explore new road projects and investments.
Aberdeen eclipses even London at peak hours and was the hardest city to get in to or out of with drivers stuck in gridlock for 24% of the time, moving at an average speed of 5.5 mph.
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The research has labelled Sunderland and Newcastle among the UK's most congested, with 11 of the 100 most gridlocked cities in the world here on our shores.
Drivers in Mexico City have to be patient.
Businesses moving about the centres of Exeter and London also suffer badly from congestion, sitting in traffic in the "city centre" 17% and 16% of the time respectively during the day.
Their worst corridor [.] rings in at 31st on the worst corridors ranking.
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