[Vincent Price voice] Imagine yourself exiting the freeway. There is an off-ramp that you take that leads to a road that leads to fast food as far as the eye can see...
I don't get it. Is it a joke about racism? Are white people broccoli? I love white people on the side of a variety of meals then.
I don't get it. Is it a joke about racism?
Yes. The comic itself is a parody of a common urban legend from the 80s and 90s of 
accidentally going into the 
part of town. National Lampoon's Vacation has a sterile version of the trope.