15. Mexico City
In just four decades, Mexico City’s population has exploded from about five to 22 million people. It’s valley setting is like a smog trap, and unfortunately the air pollution is a serious concern you can see, smell and taste. In an attempt to cut down on congestion, people with vehicles are only permitted to drive on certain days of the week, with serious fines if one violates the restriction.
16. Istanbul
TomToms’ annual traffic survey has found the Turkish city to be the most congested in the world in 2015. Not exactly a proud accomplishment. The average half hour drive in the city takes over an hour during rush hour, which results in 125 wasted hours stuck in infuriating traffic each year.
