Derailments could be getting worse even with fewer of them. The author of the letter is talking about the trend towards monster trains which suggests fewer trai

Derailments could be getting worse even with fewer of them. The author of the letter is talking about the trend towards monster trains which suggests fewer trains being run. Is the number of derailments per train going up? Is the impact of the larger trains derailing leading to more overall impact because each individual derailment is larger even though there are few of them? If I run half as many twice as large trains I'd expect fewer total derailments even if these monster trains derail more often than the more normal trains of yesteryear.