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M-173 was the designation given to two former state trunklines in the U.S. state of Michigan:
- M-173 (1928–1938 Michigan highway) near Orleans in Ionia County
- M-173 (1939–1972 Michigan highway) in Menominee
This article includes a list of roads, streets, highways, or other routes that are associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.
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←  M-172 | MI | →  M-174 | ||