The cast includes Denzel Washington, Chris Pine and Rosario Dawson.
The script, from writer Mark Bomback, follows the efforts of an engineer and his novice conductor to try and stop a train with toxic cargo from speeding out of control into a nearby city.
Schram is going to play the ex-wife of Pine's character. Dawson will be a train dispatcher that helps the men via radio. Dunn is going to be Dawson's boss.
The project was moving along when two months ago budget concerns plagued it. It should start shooting this fall in Pittsburgh.
Unstoppable was released November 12th, 2010 and stars Denzel Washington, Chris Pine, Rosario Dawson, Ethan Suplee, Kevin Dunn, Kevin Corrigan, Kevin Chapman, Lew Temple. The film is directed by Tony Scott.