User flow

A good UI does not just apply to a web site. It really impacts our everyday life. I am quite troubled by the escalator in our office building. For some reasons, the building manager switches the direction of the escalator randomly. I find myself and others walk against the direction constantly. Just like any good UI, a consistent behavior would be easier to use. You should not feel its existance if it's done right. Of course, I don't expect a building manager understand UI. I just want to rant about. ^^