Name: Billups Neon Crossing Signal The reddit and wiki might be easier to consume because they're not a video. Reddit has a pic. https://old.reddit.com/r/trai

Name: Billups Neon Crossing Signal The reddit and wiki might be easier to consume because they're not a video. Reddit has a pic. https://old.reddit.com/r/trains/comments/ze8au4/the_billups_neon_crossing_signal_an_experimental/ https://old.reddit.com/r/trains/comments/ze8au4/the_billups_... https://en.wikipedia.org/wiki/Billups_Neon_Crossing_Signal https://en.wikipedia.org/wiki/Billups_Neon_Crossing_Signal