Thanks a lot, pepeda, it's a very nice start, for sure.
My first impression is that the seams could stand out a lot more. My work monitor isn't the best so I'm sure it would look better on my laptop, but I think either way they should be more striking. Maybe making them lighter compared to the background. Other than that, I'd just say to make the three lines in the middle more precise rather than squiggly like they are. When I said "curved," I was thinking a single arc with just a little bit of curve (maybe the top one curved slightly upward, the middle one more or less straight and the bottom curved slightly downward) just to make it more interesting than a straight line. To give it some dimension. Or maybe instead of lines, you could just fill the United States with the top third red, the middle third white and the bottom third blue so the entire country is three solid colors which would represent the three regions served by the rail lines.
The only other request I'd have right now would be to make it bigger so that we could use it for larger graphics, not just an in-game logo. But this is great so far. Thanks again.