4. Mexico City, Mexico
In the last 40 years, Mexico City’s population has quadruple. Yet, the roads have mostly been kept the same. So how bad is it out in Mexico City? IBM reports that it managed to score 13 percent higher than the second-place-holder in terms of frustration, anger, annoyance, and overall driver misery. Ouch. At least there’s decent public transportation in the form of a subway system for the residents and tourists.