I pretty much kept the hammer down on the I-20 even through the rain, dropped it down near Van, when I began to hydroplane. On the way down to Florida, I averaged 83 through Texas, passed two DPS and they didn't even bother giving me a second looksee. Louisiana, as long as you kept it under 80, they were not going to mess with you. Since we traveled at night, no construction, that is where Lousiana Highway patrol usually are parked both at the beginning and in the middle...typically saw 2 at each site in the East bound lane. The drive Jackson to Mobile, only dropped it down in each of the small towns, the local P.D. will get you. Saw one county sheriff that was between Hattiesburg and Mobile pulling speeders. I averaged about 70 through most of that both going and coming back.
Typically I'll drive hard anywhere I go, but I've got the radar detector as a standby and I typically don't push my SUV's higher than 85 unless I am in Florida, where I think everyone is driving at least 90 on the I-10. The I-35 to Austin, well is pretty well patrolled, so I don't go anymore than 5 MPH above the posted. When I get down to Austin, it really doesn't matter, the traffic is backed up, so am always taking the back roads or the MOPAC to get around it all. Either that or I use the 281, bit slower, but less traffic. Been years since I traveled toward El Paso, but over on that road, I'd open it up and take my chances.
Only two states love my plates....North Carolina and Virginia.