I learned about this in a course titled Dynamics of Complex Networks and Systems taught by Mark Spong, a robotics control theorist active in dynamical systems research. Ever since learning about Braess' Paradox in that course, I have noticed examples of it in the highways of DFW. The simplest case to spot is where an off-ramp feeds directly to the next on-ramp, creating a "shortcut" for drivers who exit and re-enter the highway.

I've tried to make the case that by closing "key" exits on the highway, we could reduce congestion. But who would be responsible for making that likely unpopular decision?