The event this movie is based on, the CSX 8888/Crazy Eights incident, was a lot more dull than the movie or even the name would imply. A train carrying dangerous flammable chemicals did get loose, but there were no injuries (much less any deaths), no innocent towns or civilians were in danger, and the whole thing was wrapped up in two hours. In other words, it took less time to resolve the real-life situation than it does to watch the movie it inspired.
Now, senior engineer Jon Hosfield did have to jump onto the moving train to shut it down, but the machine was going a non-pants-shittingly ten miles an hour. That’s about the same level of risk that people take riding in the beds of pickup trucks.
Also, whoever was responsible for the incident was never publicly named or judiciously exiled to dollar burger hell, and whatever happened to them was settled internally. All in all, Hollywood took a mistake that was fixed with no problems and turned it into a massive high-stakes drama. It’s like if The French Connection had been based on a clerical error on a tax form that was quickly cleared up.