Alps' Roads - Michael Summa's Signs
Michael Summa's Sign Collection

Michael does not have many Interstate shields, but here are a pair.
Turnpike and state route shields and signs
US, Parkway, and other shields and signs

These signs weren't all mounted together, but all three routes do run concurrently so they make a nice set.
See my own sign collection
I-81 Virginia
I-84 Connecticut
I-25 Colorado
US 85 Colorado
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