Capital commuters spent almost four days a year ago stuck in traffic

Portland ranks 12 out of 240 cities nationwide, where people spend an average of 47 hours a year in peak traffic times, what the research firm colloquially calls a 'traffic jam'. That equated to $1,861 in direct and indirect costs, such as burned gasoline.

Thailand was the world's most congested country for traffic in 2016, according to a study released Monday by INRIX Inc.

But congestion has eased a bit since city officials introduced new parking rules.

The TomTom Traffic Index 2017 says Mexico City drivers can expect to spend 66% extra travel time stuck in traffic at any time of the day, up seven percentages points over a year ago. "If it costs more to travel, people do less of it", he says. In Los Angeles, the average driver saw a loss of $2,408.

Only a year earlier, in 2015, Bangkok was the 30th most congested city in the world.

The study found Los Angeles had the worst traffic in world.

"Congestion also costs our country hundreds of billions of dollars, threatens future economic growth and lowers our quality of life", Pishue said.

"To tackle this problem, we must consider bold options such as remote working, wider use of road user charging and investment in big data to create more effective and intelligent transportation systems", said Mr Cookson.

However, Exeter's city centre was the busiest to get around across all of the United Kingdom during peak hours, with drivers spending 25% of their time in congestion with an average speed of just 4.6 mph.

There's hardly a worldwide consensus on what city's commuters have it the worst.

Moscow, which ranks as the fifth worst city for evening rush hour traffic, was higher up the rankings in past years. The cities were ranked by the time the average commuter spent in congestion at the busiest time of the day.

Drivers in Mexico City have to be patient.