One thing I took in for consideration is humans’ “pack mentality”. Pack mentality might be the strongest basic instincts we have; Pack mentality means we mirror the people around us. Imagine you’re in the station waiting for the train, most of the people would take out their phone scroll through a few webs, but you have a piece of used tissue in your hands, what would you do with it? Some people would walk to the trashcan near by and throw it away, but what if you don 't see one? At the same time a man just spit his gum in the rail, won’t you do the same, throw your tissue in the rail? Although most people might think it is just laziness, irresponsible. I think the lack of way finding information given in the subway is not giving people opportunity