M-11 is maintained by the Michigan Department of Transportation (MDOT) like other state highways in Michigan. As a part of these maintenance responsibilities, the department tracks the volume of traffic that uses the roadways under its jurisdiction. These volumes are expressed using a metric called annual average daily traffic, which is a statistical calculation of the average daily number of vehicles on a segment of roadway. MDOT's surveys in 2010 showed that the highest traffic levels along M-11 were the 41,214 vehicles daily between Kalamazoo and Breton avenues in Grand Rapids; the lowest counts were the 8,153 vehicles per day in Ottawa County. All of M-11 has been listed on the National Highway System, a network of roads important to the country's economy, defense, and mobility.