Welcome aboard John . I myself are in the same boat as you, being from "the other side of the pond" . Who came up with that one?? what side of the pond is the right one?
Unfortunately , my love for the US railways is not up there at the minute, too long and drab for my liking, I prefer the passenger side of things with Rail sims and unfortunately the Us routes I have seen don't offer much in the way for passenger scenarios ( unless its a special built route but they mainly use steam engines , major fail with me there )
I have been dabbling a lot with scenarios for other routes and have 2 loaded on another site but right now I am trying to figure out the route building part and get my own route on the go . Stumbling block for me though, but I am sure I will get there eventually.
The only US route I ever enjoyed playing was unfortunately not a Railworks route but an MSTS route, although I am pretty sure I read that someone was building it and planning on a release ( NorthEast Corridor ) . Hopefully that can be reproduced to Railworks Standards

and if it does the scenario creations for that route could be endless as you can split freight and passenger services right down the middle in one scenario ( not sure how frequent or if it even happens on that route as I have no knowledge except from the MSTS version )
When I finally figure out where I am going wrong with the route buildign and beat the problems I will be uploading it here hopefully ( if Hawk doesn't reject it that is

)
Unfortunately it won't be an American Route as I said before I am from your side of the pond lol.
Just on a side note, I didn't notice how long you have been using Railworks. I was wondering if you have dabbled in the scenario creation side of things yourself. Without the community the game wouldn't grow to half the size it has and to those who have spent countless hours days and even months at building I salute you ( creating scenarios I found how frustrating it can be if something goes pear shaped somewhere )
All the best
Mark
My scenarios are short, but they leave plenty of room for scope. Time to stretch to other routes I think