We made it up north this weekend in record time, thanks to what my brother and his friends call redneck radar, i.e. relying on the even faster drivers ahead of you to reveal where police are located.
My brother claims that the other speeders are supposed to be the rednecks here. If that's true, his formulation would be atypical of redneck terms, which usually refer to the crass or low-tech improvisations of purported rednecks.
I'd thought that the redneck limo was the most famous example of this formulation, but it seems that the beach along Florida's panhandle is well known as the Redneck Riviera.
I could google any number of redneck words and probably come up with results, but I can't think of any other terms off the top of my head — most Minnesotans would probably file our local "rednecks" under white trash, so it's not a word I hear very often.