Michigan Highway 154 is the gateway to Harsens Island, an island at the upstream (northern) end of Lake St. Clair, on the eastern edge of Lower Michigan. In Algonac, a tiny stub pokes south of Michigan Highway 29, leading to a ferry over the St. Clair River that takes Michigan Highway 154 to Harsens Island. On Harsens Island, Michigan Highway 154 journeys for 6 miles, on a path overall characterized as south-southwesterly. A fork in the road on the south side of Harsens Island makes for Michigan Highway 154's southern endpoint; the road continues onward, though, as a locally-maintained street.
My photo of Michigan Highway 154 signage comes from the route's northern end, at Michigan Highway 29 in Algonac. The signage, facing west for eastbound cars on Michigan Highway 29, indicates that the ferry to Harsens Island and the bulk of Highway 154 are accessed by a turn at the signal just ahead. This photo was taken in April 2021, during a trip to Metro Detroit and the Michigan Thumb. I was on my way from Metro Detroit to Michigan's Thumb when this photo was taken.