Agreeing with the other posters here, HSC does capture the mood of PA steel and coal country, circa the 1950's. I used to drive through that territory often - running the route brings back memories. The small town night scenes along the route are especially nostalgic for me. They are for the most part nicely illuminated in TS15. The Altoona and Johnstown yards are comprehensive.
I added a working coal loader to the Altoona yard and was pleasantly surprised to see that it worked with the old PRR coal cars provided with the route. The original coal loader already in the yard did not work.
The PRR passenger cars add more nostalgia too, but they run dead silent inside and out unless you are able to add the RSDL US Wagons 01 pack to the scenario's DLC list. At least that was my experience.
Much more to do with HSC than mere long, slow coal drags, for sure. And it vaguely resembles a Currier and Ives Christmas card when you run it in the snow.

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