All of the package cars I drove varied from about 67 to 74. Posted speed limit for a little over half of my trip to my route was 70. My very last day driving, my package car was packed as full as I have ever seen a package car packed. Literally top to bottom, front to back. I was in my regular package car which was topping off around 72ish on a normal day. This last day, I couldn't get past 62 going downhill. I felt more unsafe that day than any other...due to the fact that I couldn't keep up with the interstate traffic. 18 wheelers, cars....everyone was flying past me...honking, cutting me off. It was pretty crazy.