I saw a movie few years ago 2000's about an Australian truck driver who pick up his victims on the road , it's a Hollywood production I believe . Could you help me ?

Hmmm - doesn't match exactly, but perchance this:
Road Games (1981) - IMDb (http://www.imdb.com/title/tt0083000/)

Is it Wolf Creek (2005) - IMDb (http://www.imdb.com/title/tt0416315/) ?