The ending is perfect: Bobby getting in the truck, as a passenger (no jacket), headed for Alaska. Rayette abandoned at the service station, but not yet knowing her fate.
FEP is all about restless human beings in permanent search of meaning of individual's life. Not human race's, but each person's life. It shows how every single human being stumbles in search of greater or simpler life story. Because it is important to us. We do not know where we came from, but crave to know which is the right path for every each one of us.