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Just a brief addition to what Doug has written which, by the way, is correct...Although not required I believe it would have been the practice to adivse, either by inclusion in a train order, or by message the engine number(s) of second or following sections so that there would be no doubt as to which trains following a 1st section "carrying the green" were indeed sections of that train. Why would this be a good thing...Sometimes as was mentioned as an example during WW 2 and other times of heavy traffic a first section of another train of a schedule could get in between sections of a train running in two or more sections... Sound complicated???? Indeed it was...especially during WW 2 time trains were often operating with brand new firemen and brakemen and newly "set up" conductors and engineers....Read some of the old stories in RAILROAD MAGAZINE and see the "bundles" of train orders a crew would have to deal with...Trains with right (not RIGHTS) over other trains or even right over just one section of a train running in multple sections.
Another note "thrown in at no extra charge" Trains carrying (green) signals for following sections were required to "Whistle signals" when they met another train..I believe the signal was Two longs and one short....The train to which the signals were directed was required to answer with the usual Two shorts...which was the basic acknowlegement of "I see your signals and understand". Also IIRC if a train to which the signals whistle was directed did not "answer" the the passing train was required to stop and straighten things out.
Well, this is more than you asked about, or even, maybe, wanted to know, but sometimes I just can't help myself.
Pete
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From: 'Douglas Harding' doug.harding@iowacentralrr.org [CBQ] <CBQ@yahoogroups.com> To: CBQ <CBQ@yahoogroups.com> Sent: Tue, Jun 9, 2015 7:46 am Subject: [CBQ] Re: The Use of Class Lights on GP 7's and 9's Dave, the colors actually mean different things.
Green meant another section was following, ie as 2nd section of a scheduled train, running on that train’s schedule but perhaps 20 minutes later. It was not an extra as it was considered a scheduled train and treated as such. Rules permitted multiple sections, and heavy trains were often broken into sections. This was common with passenger runs, and esp during WWII. The last train running on that schedule would have no flags or class lights showing, which told everyone it was the last section. So if you were an inferior train waiting in a siding for a scheduled train ie Timetable listed, and you saw green flags on an opposing train, you knew you could not move until you saw a train moving in the same direction with no flags. And you might see three trains in succession with green f lags. But you could not move until you saw the last section of that train passed you.
White means extra, as in a train that has no schedule and is inferior to all other trains, except per direction. An extra moving in the superior direction would have rights over an extra moving in the inferior direction. If you were flying white flags you had to get out of the way of everything else on the road.
Doug Harding
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