Here is a chart that I have bookmarked..
https://signals.jovet.net/rules/CROR%20Signal%20Rules.pdf
My wife and I are currently on vacation, and today we traveled from Marshfield, WI to Duluth, MN. The first 20 or so miles of the journey followed the CN Superior Sub, which appears to be a well-maintained mostly single-track mainline. Southeast of Marshfield there is a long passing siding, and six miles or thereabouts northwest is another passing siding near Spencer. All of the signals along this stretch between them contain two heads. As we left Marshfield and approached Spencer, the signal aspects were very interesting- just NW of Marshfield a signal showed flashing yellow over green; two miles further the next signal showed solid yellow over green; the last at the start of the Spencer passing siding was red over yellow. My suspicion is that a north/west bound was lined into the siding at Spencer, where it would meet a south/east bound train. Am I correct, and what do the signal aspects like this for CN mean?
Brian (IA) http://blhanel.rrpicturearchives.net.
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