I was a baby when we began driving across the bridge and remember stories of the ferry service as my parents had their parents in the UP but my parents lived in Livonia, to this day I love the sight of the bridge and even hearing the name Mackinaw brings back fond memories of my childhood

"There could be no better evidence of need for a bridge or TUNNEL than the picture of a score or men and women climbing from the decks of a ferry boat to stumble across the jagged ice-field as the only means of completing their crossing."

I'm curious as to why a tunnel was apparently never seriously proposed. Navigation clearances, the need to stand up to the rigor of Michigan's weather and ice fields during the winter months, collision with aircraft and people falling off the bridge would have been eliminated as considerations in one fell swoop.

It surely wouldn't have seemed any less feasible than the English Channel project undertaken in the 1800s (and stopped and held in limbo for a century out of political obstacles rather than engineering ones). Maybe there were safety concerns over what would happen in case of an accident (which obviously would be a huge concern compared to the short Windsor tunnel)?