CLICK ON IMAGE TO ENLARGE

UPDATE:

Thanks to our two viewer comments, we've re-thought this photo. We believe it is the Interstate 75 overpass over the abandoned AC&Y Railroad, east of Bluffton.

The northbound bridge is completed and, actually traffic is one-way on that bridge, while the southbound bridge is still under completion in this photo.

HERE'S WHAT WE ORIGINALLY THOUGHT, AND THE INFORMATION BELOW IS NOT CORRECT:

Here's an aerial view of construction of the Bentley Road overpass. Or is it? We don't have all the facts about this photo, but here's some ideas (viewers are welcome to correct us): This view appears to be the overpass portion of the then-Nickel Plate Railroad. 

If we could see further east we'd see the overpass portion of what would be Interstate 75.

But then, we might really be way off base here. The back of the photos has a pencil written "Bluffton." We are taking our cues from that one word.

Viewer opinions are welcome.