Similar delays already have disrupted Amtrak's Empire Builder in the past few weeks, due to both severe winter weather and heavy freight activity due to crude-by-rail movements emanating from the Bakken Shield in North Dakota.
Northstar Line service runs from Big Lake, Minn., to Minneapolis. Service began in November 2009
"Expect significant delays (60-90 minutes) due to freight traffic," Metro Transit said in a tweet Monday, reported first by local media. "Consider alternate travel arrangements if possible."