2015-05-15, 00:50
Positive train control wasn't installed
A system known as positive train control likely would have kept the Amtrak train from derailing in Philadelphia, National Transportation Safety Board Member Robert Sumwalt says.
http://rss.cnn.com/~r/rss/edition_techno...index.html
A system known as positive train control likely would have kept the Amtrak train from derailing in Philadelphia, National Transportation Safety Board Member Robert Sumwalt says.
http://rss.cnn.com/~r/rss/edition_techno...index.html