Yes, though a lot of them have 85th percentile speeds more than 5 mph above the speed limit. And they still have a tendency to randomly reduce the speed limit t

Yes, though a lot of them have 85th percentile speeds more than 5 mph above the speed limit. And they still have a tendency to randomly reduce the speed limit to 55 mph without any obvious difference in road design (Pennsylvania and Maryland for example). Also, a lot of those states only recently allowed speed limits above 65 mph (far more recently than 1995). So you basically have a generation of motorists who grew up and spent a substantial portion of their driving years with highway speed limits that virtually no one complies with, and that it was okay to drive 5 to 10 mph above the speed limit. This attitude spread to other road types as well meaning that even appropriately posted speed limits (e.g., 25 mph residential streets) have a high degree of noncompliance. It's going to take a while to undo the damage, but that's what happens when traffic control devices are effectively used to "cry wolf". Edit: s/compliance)/noncompliance/