Lansing Millis was successful in turning the small town of Millis into an important area of Massachusetts. Lansing Millis, who was widely known as a railroad entrepreneur, built up a strong rail system in Millis. This was arguably his most important accomplishment, as the rail system is regarded as the most significant factor in its independence from Medway. In addition, the railroad system was a major factor in the early promotion of economic growth in the town and the integration of Millis to the larger cities of Dedham, Boston and Cambridge. Currently, this old railroad that formerly began in Medway is known as the Bay Colony Railroad. The Medway tracks have since been dismantled, making Millis the railroad's western terminus. The railroad is now mostly defunct, but several miles of the Bay Colony tracks in Millis are owned by the MBTA and are leased by the Bay Colony Railroad line. The Bay Colony Railroad merges with the present day MBTA Commuter Rail in Needham.