Los Angeles is renowned for its bad traffic—and it is pretty terrible. But plenty of cities around the globe have streets and highways that are even more clogged. Since 2004 the makers of TomTom GPS devices have tracked real-life driving patterns in the Americas, Europe, South Africa, and Australia. That makes their annual traffic survey one of the most accurate barometers of traffic congestion in nations that allow GPS reporting. The impact of all that time in the car on the environment and drivers’ mental health is no joke. Millions of automobiles idling on roads release toxic pollutants into the air, and audiobooks can only go so far to soothe stressed-out drivers. Click through to find where congestion levels are seriously the worst.