scott is partially incorrect

NS can cut the train speed by issuing slow orders, which are temporary speed limits. Basically every line has a table that tells the engineer and conductor how fast they are allowed to go [[among other things). Issuing a slow order is effectively pasting over the speed limits with slower ones. They do this because track inspections reveal that the tracks are no longer up to the standards required for the published speed limits

NS hasn't spent money on maintaining those tracks for some time now. And NS doesn't want to own the rail line anymore. The state of Michigan is going to purchase it and start to rehab it [[with the money mentioned earliers).

It is pretty much a forgone conclusion at this point that the line will be owned by the state and either leased over the long term to Amtrak or operated by Amtrak in the short term. NS will probably continue to be a secondary tenant [[by having trackage rights) but it will cease to be a "freight line." It isn't really a freight line now. It gets up to 8 passenger trains a day and very little freight.