Of course, reading this post, I had to construct a map of data I compiled from the Census, which collaborated with Texas A&M on a traffic survey.
I suppressed a lot of the labeling, for instance, I only labeled the county commutes that were in the lowest count class.
The amount of time this one took was staggering. Doesn't look like much, but very complicated.
In spite of what many may purport to believe, it seems by the data I compiled here that most commuting still happens inter county, and not county to county.