Mich. Comp. Laws § 462.15
It shall be unlawful for any common carrier to enter into any combination, contract or agreement, express or implied, to prevent by change of time, schedule, carriage in different cars, or by other means or devices, the carriage of freight from being continuous from the place of shipment to the place of destination; and no break of bulk, stoppage or interruptions by such common carrier shall prevent the carriage of freight from being and being treated as 1 continuous carriage from place of shipment to the place of destination, unless such break, stoppage or interruption was made in good faith for some necessary purpose and without any intent to avoid or unnecessarily interrupt such continuous carriage or to evade any of the provisions of this act.
MCL 462.15