Tony Scott boards 'Unstoppable'

Director hitches on to Fox thriller

That puts "Unstoppable" on an express track toward production. Scott is working with screenwriter Mark Bomback to get the picture in shape to be shot later this year.

The drama involves an unmanned runaway train that is carrying a cargo of toxic chemicals. An engineer and his conductor find themselves in a race against time.

Julie Yorn is producing, and Scott will board the project as a producer as well.

Scott most recently completed "The Taking of Pelham 1, 2, 3," the Columbia Pictures drama that will be released June 12.

Scott is repped by CAA.