I wrote about subway tunnel advertising before, but just stumbled across pictures (here) of what these ads look like from a static point of view, courtesy of SideTrack Technologies, a Canadian company that apparently makes the ads.
Update: Subway Tunnel Advertising
I wrote about subway tunnel advertising before, but just stumbled across pictures (here) of what these ads look like from a static point of view, courtesy of SideTrack Technologies, a Canadian company that apparently makes the ads.
