Fortunately for me, this happened just before the NCRY's Brightside Yard, and there was a place I could pull over and park. I walked across the road to the grade crossing, and watched as the short train crossed through the wig-wag-protected crossing and into the yard.
The reason I don't exactly which locomotive was running was because I neglected to bring my camera with me. This is annoying because I remember seeing the camera in its bag and thinking, "I should toss that in the car -- never know when something interesting might pop up." And then I walked off without it. Had I remembered it, I would have been able to include footage of the train in this message. Phooey.
Speaking of walking off without things, I realized this evening that I forgot to pack a mouse for my computer. Normally one lives in the computer bag, but it must have fallen out at home. This is going to be very annoying, because for a lot of the modeling work I do, I have to do a lot of pointer work, and it's much easier with a mouse than with a touchpad. I hope that a mouse is sitting around among the bits of computer stuff hanging around Mehama.