So pleased you included our own "Big I" interchange in New Mexico. It is, indeed, the crossroads of the state. The big I is a heck of a lot safer than what it replaced, but now, at rush hour, it is usually jammed in at least two directions. Of course, the biggest pain are the drivers who are going 80 in the fast lane, then decided to switch up to five lanes for their exit at the last minute. The accidents we have here are horrible!