Tony Scott will next direct the 20th Century Fox thriller Unstoppable. Scott is working with screenwriter Mark Bomback to get the picture in shape to be shot later this year.
Martin Campbell was previously on board to direct.
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 action-thriller that will be released June 12.