Hello everyone, glad to join! I have recently gotten much more into railfanning and have no plans to stop. It's fun and a great way for me to kill time, because I get a lot of it being a longhaul trucker. I would like to start out with a question for whoever may know. I had some time to watch the action on the CSX A&WP Sub in Newnan Georgia today, and caught about six trains, not too bad. But after a few passed, I noticed something that seemed odd to me. A quarter mile south of me is a diamond where NS crosses the single CSX track, and two double head interlock signals on the CSX line that face outward from the diamond. I noticed both signals were displaying an approach signal, yellow over red. Until now I had believed that if one signal displayed approach, then the opposing signal should display stop. Why would these signals display approach in both directions? The signals have been like this for several hours. Any help or info is greatly appreciated!!!