Alex, I love those shots - especially the second one!
I had Presidents Day off, and Mom Nature cooperated with gojuss blue skies. So I'm going to bore you with a round-trip sequence from the west end of Rockville Bridge, up 322 to Thompsontown, and then back down 322 to the east end of Rockville Bridge.
Stack train 21D near Cove:
and the same train 21D at Thompsontown:
An across-the-Juniata shot from 322 of another westbound stack:
Across-the Susquehanna of an eastbound on Stony Creek Bridge (?):
An eastbound out of Enola splits the signals on the bridge:
...and meets a westbound stack:
Ron