Neat stuff!
That globally-known NKP passenger train appears to have car off of the Phoebe Snow to/from Buffalo.
The PCC cars on the Shaker Heights line were unusual in that that they were set up for multiple-unit operation. (Around the 14:35 mark). Another unusual feature is that many had doors on the street-side of the car, like MBTA's PCC's. Not many transit systems had that.
Ron