Tony Scott has boarded the Fox suspense thriller Unstoppable, with full intention of making this the next film he directs.

That means Unstoppable is on the fast track to production. Scott is laboring with screenwriter Mark Bomback to get the movie in form to be filmed later this year.

The story is a familiar one, but Scott will drive it to success, about an unmanned runaway train that is carrying a cargo of toxic chemicals. An engineer and his conductor find themselves in a race against time.