A man and a woman are driving they get in a crash they pull over at an old moteland he loses the womanand all the cars in the motel parking lot are all really old and dusty and haven't moved in a long timeand he's trying to find the woman and the movie gets real weird what is it called

Possibly this:
http://en.wikipedia.org/wiki/Vacancy_(film)

Beneath the Dark (2010)
From IMDb:
Paul and Adrienne, a young couple burning up the desolate miles on the road between Texas and LA, check into the equally desolate but eternally stylish Roy's Motel and Café.
As if preserved in time, the motel proves to be a strange and surreal place where the guests are forced to confront the secrets that they keep – from the world and from each other.

Beneath the Dark (2010) - IMDb (http://www.imdb.com/title/tt1422800/)

Here's the movie trailer:
'Beneath The Dark' Trailer HD - YouTube (http://www.youtube.com/watch?v=dwUKsdGo6ZM)