What railway knowledge do you need to know about the critical situation?

What kind of railway knowledge does Dangerous Situation Speed ????contain?

Answer: Dangerous Situation Speed ????About May 15, 2001, on a railway line in northeastern Ohio, railway staff discovered A train with 47 carriages hanging behind the locomotive did not run according to the predetermined plan, but rushed forward. This runaway train is not only huge in size and has many carriages, but the most frightening thing is that two of the carriages are loaded with industrial waste and highly toxic substances. If these highly toxic substances are dumped locally and spread into the air or water, it will cause serious harm to people. This poses a fatal risk to local residents.