No Speedy Gonzales

I was out getting this week's dosage of Vitamin D today and on the way back I was "stuck" in traffic behind a "Putstang" with Chihuahua plates (that's a state in Mexico, not a vanity plate for toy dog owners). By stuck, I mean that he was going the speed limit in the left lane, no matter how empty the highway was ahead of him. He finally let me by when he found a half mile of empty right lane.

I've noticed that Mexican drivers, when they can be identified as such, are very conscientious about observing the speed limit (while about half of all American drivers are not). I wonder if it's because they're conditioned to avoid contact with corrupt Mexican police officers? Or are they afraid of scrutiny from American law enforcement? It could be neither or both, but I can sympathize, having driven through Illinois once.