What’s one major consequence of a city becoming a booming economic center? Increased traffic that leads to mind-numbing, stop-and-go commutes. IBM surveyed drivers in 20 of the world’s metropolises to see which city’s drivers experienced most traffic-related woes. Its Commuter Pain Index takes into account factors such as time drivers spent stuck in traffic, high gas prices, stress and anger caused by long commutes, and even instances where the specter of a bumper-to-bumper drive pushes drivers to cancel trips. Check out the results here.