Posted by Chris Brown on June 14, 2008  Does anyone find it weird that railroads have BLUE stop signs? Very interesting photo, Paul. Posted by frm1941 on June 15, 2008  It's called blue flag protection. You cannot move a car or locomotive with a blue flag on it, nor can you enter a track with a blue flag displayed. Because men are on, under or between cars/locmotives preforming work. GCOR Rule 5.13. Posted by Mike Christenson on June 15, 2008  How long have you been rail fanning Posted by Doug Wolfe on June 15, 2008  Awesome Paul. Great photo.

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