M-185 is a state trunkline highway in the U.S. state of Michigan. It circles Mackinac Island, a popular tourist destination on the Lake Huron side of the Straits of MackinAC. Until an accident in 2005, it was the only state highway without any automobile accidents.
About M-185 (Michigan highway) in brief

It ends at the city’s water filtration plant, which is just beyond the viewing area beyond the Arch Rock viewing area, beyond which the road returns to the island’s shoreline. The beginning and ending of the highway is marked at the intersection of Main and Fort streets next to the visitor center. That building is operated by the MISPC, but it was originally a US Coast Guard station. It is one of only three state trunk line highways in Michigan on islands; the others are M-134 on Drummond Island and M-154 on Harsens Island. No part of the roadway has been listed on the National Highway System, a network of roadways important to the country’s economy, defense, and mobility. It has no connection to any other Michiganstate trunkline highways—as it is on an island—and is accessible only by passenger ferry. The State Department of Transportation does not install the standard state highway reassurance markers along this roadway. It uses wooden markers to measure miles instead of the common metal signage; these signs are erected by the Michigan State Park Commission, as MDOT does notinstall the standardState Highway reassurance marker along the roadway. The City of MackInac Island calls the highway Main Street within the built-up area on the island’s southeast quadrant, and Lake Shore road elsewhere.
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This page is based on the article M-185 (Michigan highway) published in Wikipedia (as of Dec. 07, 2020) and was automatically summarized using artificial intelligence.






