If the highway/town actually . . . *MAJOR SPOILERS*
Based on the movie and some other comments here, it seems like the idea is that the town is a purgatory of sorts.
But I have to wonder (and sorry if someone asked this in another thread): what do you then make of the innocents in the story? I'm thinking specifically of the wife and daughter of the man at the end (though you could also count the other two band members from the band). The wife seems genuinely shocked when the one man whispers in her ear what the husband did--I think the most she's guilty of is maybe suspecting something. And the daughter seems definitely to be an innocent. She does commit acts of violence, but only in defense of her own life and the lives of her parents (and she does not know about what her father did).
So are they then transformed into the vengeance creatures (the floating skeletons) and become a part of the purgatory? Do you think their "spirits" are taken somewhere else?
Do you guys think that the men from the beginning/ending would have made it out alive if all they'd done was go after the father/husband? Do you think that "righteous" killing would have still left them trapped?