Flipped Interchanges

[PurdueBill]

It's not an interchange but I always found it fascinating how I-70 in Indianapolis changed from going under Sherman Drive and a railroad track to going over it in 2008.  It required a lot of filling in.  Surprisingly perhaps, the bridges for Sherman and the railroad are still there going over nothing but fill.
https://goo.gl/maps/yfM76W6jnS9tYnZx6
If you poke around, you can look east from Sherman in modern day to see the railroad bridge still there, now under I-70 but still carrying the tracks.

[roadman65]

The interchange with Jefferson Highway and the Huey P. Long Bridge got flipped when the bridge got widened.  The bridge approach over Jefferson Highway now, but previously Jefferson went over the bridge approach and Clearview Parkway