This is Nero Tower on Conrail's Chicago Line (former NYC; LS&MS). Pine Junction on the B&O is behind the tower, while the EJ&E Gary - Griffith mains cross overhead on the bridge. Photo taken in November 1979, Doug Davidson photo with permission
Pence tower in Momence, IL that guarded the diamond of the ex NYC Kankakee Secondary with the ex C&EI UP Villa Grove Sub on July 6, 1991. This tower was torn down in 1997. Photographer unknown, Chris Howe collection
Westbound Trailvan "on the circuit" of the interlocking at the DT&I crossing, Lima, Ohio. Back when the Fort Wayne was big-time railroading, running trains by current-of-traffic, rule 251, interlocking and block station control. photograph collection of Eric Kretz.
Union City, IN tower that guarded the diamond of the ex PRR Pan Handle Chicago to Columbus mainline with the ex NYC Big 4 line on March 19, 1997. This tower still exists today and is used by maintainers as a glorified storage shed. Chris Howe photo
The former PRR Whiting Interlocking Tower at Whiting has been removed from service and is boarded up in this view looking west on what remained of the Fort Wayne line in June 1982. The line crossing the Ft. Wayne line was the B&OCT Whiting branch, both of which are abandoned today(In fact there are some homes built on both lines' ROW now). Doug Davidson photo with permission