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In thinking about PTC leading to automated operation, I went back and reviewed another thread from last year about crewless running.  It has become one of the prominent references on the topic when you do a Google search. However, I am puzzled by something.  Why are many of the posts in this thread out of sequential order?  When reading the thread the way it is displayed, comments quoted in some posts are quoted before the comments were actually made. The dates of the posts clearly show that they are listed out of order in the thread.  As a reference resource, its scrambled sequence makes much of it meaningless. Why have the posts gotten out of sequence?  Look at it here: <a href="/trn/f/111/t/203077.aspx?sort=DESC&pi332=1">http://cs.trains.com/trn/f/111/t/203077.aspx?sort=DESC&pi332=1</a>
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