Answer: Los Angeles

If you’re a resident of Los Angeles and you like to complain about the obscenely heavy traffic right in your backyard, we’re here to tell you that you’re absolutely justified in doing so—more than justified even. While there are many areas around the United States with bad traffic problems and lengthy delays, there’s nothing in the U.S. (or the world for that matter) that rivals the traffic of the East Los Angeles Interchange.

The interchange is the meeting place of four separate highways: I-5 (Golden State Freeway/Santa Ana Freeway), I-10 (San Bernardino Freeway/Santa Monica Freeway), SR 60 East (Pomona Freeway), and US 101 (Santa Ana Freeway). As even someone who has never driven the busy interchange can imagine, that’s a lot of cars coming together at once. The interchange typically has bumper to bumper traffic almost all day and the southern portion alone handles over 550,000 vehicles per day. To put that into perspective, that’s roughly the population of the entire state of Wyoming, in car form, passing through the exchange.

Further complicating the whole affair, not only is it the most heavily traveled interchange in the world, but the layout of the highways is not conducive to easy movement between them. In order to move from one highway to another, travelers frequently have to exit the interchange all together and transition using smaller interstate connections instead of remaining on the main exchange.