DON'T USE YOUR BRAKES ON THE HIGHWAY.
When you have to use your brakes on the highway, you have done something wrong. If you follow at a safe distance, don't drive a lot faster (or slower) than the other traffic, and pay attention to what you are doing, then you should be able to safely slow down to turn or exit without ever using your brakes. Of course, sometimes it is some other idiot who does something wrong, and sometimes you need to use your brakes just to let the other traffic see that you are slowing down. I have driven the highway without brakes for years.