Wir begrüßen euch in der Fan-Community zu den Spielen Transport Fever und Train Fever, den Wirtschaftssimulatoren von Urban Games. Die Community steht euch kostenlos zur Verfügung damit ihr euch über das Spiel austauschen und informieren könnt. Wir pflegen hier einen freundlichen und sachlichen Umgang untereinander und unser Team steht euch in allen Fragen gerne beiseite.
Die Registrierung und Nutzung ist selbstverständlich kostenlos.
Wir wünschen euch viel Spaß und hoffen auf rege Beteiligung.
Das Team der Transport-Fever Community
You made me think. Curious. And google 
...a lot.
That's what wiki says: "There is no national standard or system for railroad signaling in North America. Individual railroad corporations are free to devise their own signaling systems as long as they uphold some basic regulated safety requirements. Due to the wave of mergers that have occurred since the 1960s it is not uncommon to see a single railroad operating many different types of signaling inherited from predecessor railroads. This variety can range from simple differences of hardware to completely different rules and aspects. While there has been some recent standardization within railroads in terms of hardware and rules, diversity remains the norm."
So... good luck with that. While it would further the immersion of the USA DCL, I dont see anyone sifting through all the possibilities. btw, I think the german kompaktsignal system looks pretty good in the american environment. So, no real need here. Sorry.
The NS signal looks a little more similar to your link, if that's helps 
Edit: What does it mean...? 
Thank you for your thanks. You're welcome. And thanks to Colt for laying the foundation.
Sorry for the other thing. But it's just my personal humble opinion. Tried one of the signals I linked?
