The Michigan Department of Transportation ( MDOT ) , as a part of its maintenance responsibilities , tracks the volume of traffic using its roadways . These levels are expressed in terms of a metric called average annual daily traffic ( AADT ) , which is a calculation of the traffic along a segment of road for any average day of the year . In 2009 , the department 's measurements indicated that a segment of M @-@ 82 west of Fremont had the peak volume for the highway at 16 @,@ 532 vehicles daily . The traffic nadir was 4 @,@ 018 vehicles east of Newaygo . In addition , MDOT has not had any section of the highway listed on the National Highway System , a network of roads important to the country 's economy , defense , and mobility .