Lol just the plain box being there is good enough, at DeKalb Avenue after school, you always see the box light up about a minute before the train comes. Nobody will activate anything unless it's coded into the route somehow, if it's possible. Once, you pass a certain point the light will turn on? Maybe like an animated signal but that doesn't matter. A good idea is to have the box already set up. It'll be in the route just for show.