Quoting David Soderblom <drs@...>:
I suspect we need information on operational practices to answer this,
but my guess is that you'd see more open doors in locals that gather
the empty cars. After they're cleaned and checked at the major yard,
the RRs closed the doors before they hit the main line. Hence both
observations are correct, yet incomplete.
Good point! Thanks for bringing it to our attention.
Best wishes, Don Valentine