Conrail's Fort Wayne line is the ex-PRR mainline from Pittsburgh to Chicago, famously known as the route of the Broadway Limited. This double track mainline was classic Pennsy with position light signals and towers aplenty. Unfortunately, all those classic aspects, along with the competing ex-NYC mainline to the north, led Conrail to start downgrading it in the early 1980's. They routed most of the Chicago traffic off at Alliance, OH and single tracked from Crestline, OH west through its namesake city of Fort Wayne, IN to Chicago in 1985 and '86.  From Pittsburgh to Alliance this line was very busy with traffic from Cleveland joining on its final approach to Conway Yard in Pittsburgh. From Alliance to Crestline, OH this line was still a double track, well used, main with traffic for Indianapolis and St. Louis. From Crestline through Ft. Wayne it was a single track secondary dispatched by Form-D's, seeing only local trains and a few roadrailers. West of Fort Wayne the only Conrail train to use the line was FWEL and ELFW, which only ran to Warsaw before turning north to Elkhart. Norfolk Southern bought the line west of Ft. Wayne from CR in 1994 and used it until the merger as a second track for its Chicago trains trying to avoid congestion on NS' ex-NKP mainline.
You can also view this gallery on an interactive map.