OMG Full Of Vigor!

Silent Hill like every supernatural thriller steals the sixth sense ending. Where you found out someone or something was already dead. Its been done the last 5 summers atleast once. The ending is anitclimactic, when you found out the mom,girl, and cop died in the accident on the bridge. And even when they win in the end you find out they can't go back to there normal lifes, because they are dead.
 

Actually, you're wrong because if that was true, they would've found the dead bodies in the cars. Instead, they didn't.

The more logical interpretation is that due to her deal with the devil, Rose cannot leave the Foggy world anymore.

But hey, it's fun to get angry and critical, huh?