Many trucks have trackers on them, so speeders get caught. You might be able to get away with a short burst of speeding, but if you drive 1,000 in 12 hours, you are losing your job.
The best idea is to go the safe speed, and maybe listen to music, entertainment, or news.
I tend to put it on cruise control at the speed limit. Sometimes local police will pull over out of state licenses for even a little speeding, so why chance it.
I am willing to drive, sleep in my car, and get anywhere in the lower 48. I have not driven to Alaska, and no one can drive to Hawaii.