[holymoly]

Well, what a target! If they dropped that bridge, they'd cut the Upper Peninsula from the Lower Peninsula in Michigan. Hmm...

Or they could've been planning to simply open gaps in the center two lanes.

For those who've never driven across the Mac, the center two lanes (once you're off the causeway) are steel grate. (Scares the crap out of some people).

[MineralMan]

How do those grates do in the snow? I'll bet the design is supposed to have the snow drop through the grating, keeping the roadway clear.

If it works, it's a great idea.