The speed limit on the interstates in Arkansas drives me nuts. The speed limit for cars and small trucks in 70 mph, and it is 65 for 18 wheelers. That doesn't sound so bad, until you are stuck (for like the 5th time just trying to LR from Memphis) behind an 18 wheeler that is trying to pass another 18 wheeler in the other lane. . .on a two lane interstate. That is a rolling roadblock, my friends.