Two actors in this movie have played the husband of Meredith Baxter in television series: John Rubinstein in Family (1976) and Michael Gross in Family Ties (1982).
When Rearden and Dannagger discussing the steel shipment in the hotel, an establishing shot shows the exterior of the Wayne-Falkland as a typical glass-and-steel NYC cube. One the back of the hotel door is a standard fire-escape map showing the floor plan of a curved building, presumably the hotel where the interior shots were filmed.
The moving part of the "Rollout switch", the 'switch rail' is shown for a railroad switch for track going off to the right. When the Army Special freight train is shown driving over the switch, the switch is shown to go off to the left.