In this 2007 digital illustration provided by Crown Infrastructure, an image showing what a proposed safety system would look like if installed in the New York subway system at the Gran

 

              In this 2007 digital illustration provided by Crown Infrastructure, an image showing what a proposed safety system would look like if installed in the New York subway system at the Gran
In this 2007 digital illustration provided by Crown Infrastructure, an image showing what a proposed safety system would look like if installed in the New York subway system at the Grand Central station is shown. New York City transit officials are considering installing barriers like this one after two people were pushed and a third fell to their deaths on the tracks since early December 2012. (AP Photo/Crown Infrastructure)