I was lucky enough to catch one of the heritage units recently: AMTK 145 stops to let passengers board train 80 It was stopped at the Amtrak station to load passengers for train # 80.
It actually arrived at the same time as train # 92, which comes in on the CSX "S" line: AMTK 165 leads train P092 away from the station (Train # 92 was 2 hours late)