Portal:Michigan highways/Did you know/September 2017


 * ... that the longest state highway outside of the Interstate or US Highway systems in Michigan is M-28 (pictured)?
 * ...that prior to the opening of M-231, a "M23.1k Run" was held with participation limited to 231 runners?
 * ...that the Black River National Forest Scenic Byway in the Upper Peninsula connects to the tallest ski flying hill in the world and one of two National Forest harbors in the United States?
 * ... that in 1966, the freeway conversion of US 131 forced the former Grand Rapids Speedrome, a race track, to close?
 * ...that CR 510 in Marquette County is the remnant of the segment of M-35 through the Huron Mountains that was cancelled in the 1930s?