Michigan State Route 40 is the main north-south highway in Eastern Cass County. This runs from the Cass/Van Buren County Line to U.S. Rt. 12, near Mottville. MI St Rt 40 passes through the following towns in Cass County. Marcellus Jones
MI St Rt 40 is not multi-plexed in Cass County. MI St Rt 40 intersects the following highways in Cass County. Michigan State Route 216, at Marcellus. Michigan State Route 60, at Jones.