The National Association of Railroad Passengers wrote to U.S. Transportation Secretary Anthony Foxx this week urging him to intervene.
Amtrak’s Empire Builder service runs along a BNSF Railway route that has seen an increase in oil shipments from the Bakken region of North Dakota and Montana.
Winter weather has exacerbated several months of disruptions. Westbound Amtrak trains this week have had to bypass stops across much of North Dakota. Delays have reached up to 10 hours.
A BNSF spokeswoman could not be reached.
Amtrak spokesman Marc Magliari says BNSF has said disruptions could continue for months.