One thing that's much worse here in the South vs. what I experienced in Ontario is truckers camping in the left lane. I checked, and Tennessee does have laws similar to Ontario against truckers using the left lane, though it's not as strict because it does allow for them to use it for passing slower vehicles. Anyway, truckers here, at least 50% of them, just sit in the left lane at 65mph, while the majority of traffic is doing 75-80mph. Creates a rolling bottleneck effect that's extremely irritating.