Fun with Chevy

I picked up a yellow Chevy as my tailgater for the most of the first part of my drive. When I turned onto the 40 m.p.h. stretch, I lost him. It wasn't until halfway through the next 30 m.p.h. stretch that he came up behind me again. I wonder if he stopped for a cup of coffee or just drives 40 all the time so he couldn't catch up with me until the speed limit went down.