M-221 (Michigan highway)
M-221 is a short state trunkline highway in the Upper Peninsula (UP) of the US state of Michigan that connects M-28 with the community of Brimley and Brimley State Park. The highway was originally part of M-28 until the 1940s when it was briefly a local road. It has been a state highway again since it was designated as M-221 in 1945. Route description M-221 runs for north from M-28 into the unincorporated community of Brimley in Superior Township. The highway passes through rural fields and woods until it enters downtown. At the corner of Main Street and Lakeshore Drive, the signed portion of M-221 ends, but state maintenance continues on Lakeshore Drive across the Waiska River. The total length of the highway, including the unsigned segment, is . M-221 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 2009 showed