They own the infrastructure from coast to coast. Saving a penny a mile on maintenance is a lot. The tracks are in very bad repair.
Safe and effective!
https://nypost.com/2023/04/02/cdc-workers-assessing-east-palestine-derailment-got-sick/
“Seven US government investigators became sick while researching the possible health impacts of the East Palestine, Ohio, train derailment in early March, according to the Centers for Disease Control and Prevention.”