Niles Junction, OH: CSX/B&O crosses over NS/PRR

(Satellite, my guess based on the aerial photo below)

Note the tower in the background.

Villiam Vandervoort posted
From a 1927 Railway Signaling magazine. A location where the B&O and the PRR paralleled each other.

Gerald Wills commented on the above posting
A bad ektachrome slide scan, but lasted into the early 1980's

1954 Girard and 1959 Warren Quads @ 24,000 via Dennis DeBruler

You can still see the "land scars" for the two connections. Pennsy had trackage rights on the B&O between here and Ravenna, OH.

Satellite

The photos above indicate that the tower was on the north side of the tracks. 

Apr 27, 1950 @ 19,200; AR1KM0000020066