Are there rails on your abandoned line, or are you seeing an old bed?
Just west of Exit 97 appears to be an old bed at the small mill looking building with a Triangle Tech sign on it. Don't know for sure, but guessing either B&O or Pre-B&O to the BR&P. B&P's main from Buffalo to New Castle goes under 80 in this same location. There is a line east of town that goes under 80 at Exit 101, but it is still used by the B&P to go to Driftwood (former Shamut). Only other possibility that I can think of is farther east near the Woodland exit. There was a RJCP line that went through Philipsburg. Last time I was through there it didn't appear used very much, if at all. I don't think this line went under 80 though. RJC's main does cross 80 and go to Keating. That's just before the Woodland exit. Not sure if it is over/under.
The trails are nice, but let's save the rails!!!
My Railpictures.net
[url=http://johngage_51.rrpicturearchives.net/]My RRPA[/url]
My NON RR pics