michigan highway state trunkline highway state michigan runs near highway serves site current county international airport designation twice roads lower_peninsula 1910s 1930s current usage dates mid-1990s route description starts exit interstate near short section runs concurrently connect ramps interchange section runs northeast southwest freeway designation turns southeasterly tone road running past forested area tone road curves sharply northeasterly southeasterly run north end runway complex county international airport highway runs east past airport terminal area south prison residential area north near lake crosses highway leaves base runs forest intersection terminates roadway continues eastward mile road township listed national_highway_system michigan_department_of_transportation mdot network highways important country economy defense mobility mdot annual surveys traffic counts value called annual average daily traffic aadt measurement number vehicles road given day year survey showed vehicles western section highway trucks included count eastern section vehicles trucks history july existed highway lower_peninsula connecting adrian somerset highway included route highway designation shifted section highway previously near designation decommissioned roadway transferred local control current designation created tone road transferred mdot department assigned roadway designation included map major intersections entire highway
M-80 (Michigan highway)