MTA train conductors need to do something similar in the New York metro, as there is a striped black-white sign they need to point to at each stop (it gets reco

MTA train conductors need to do something similar in the New York metro, as there is a striped black-white sign they need to point to at each stop (it gets recorded on camera): http://m.huffpost.com/us/entry/4178532 http://m.huffpost.com/us/entry/4178532