Amtrak Michigan Line train and maintenance operations in Berrien and Cass County Michigan. The receiver is located in Saint Joseph, Michigan, approximately 25 miles from the tracks. As a result, the trains themselves are rarely heard, but the dispatcher can be heard coordinating meets between trains. Both sides of the conversation can be clearly heard when maintenance crews call for track time using the Buchanan tower. Busiest 2am-6am on weekdays and when trains meet in the Niles-Dowagiac area. Frequency: 161.505.