Making Meaningful Signal Photos.
As a photographer working from the ground (as opposed from the locomotive cab), finding situations that illustrate some of the less common aspects in the rule book can take lots patience.
Study this image, there’s a lot going on here: Norfolk Southern’s westward symbol freight 23K holds the mainline at Rock Glen, New York where it will meet the eastward 38T. The dispatcher has lined 38T through the siding, and as a result the home signal displays a red-over-yellow-over-green aspect—‘Medium Approach Medium’ (rule 283a).
The ‘Medium Approach Medium’ aspect effectively tells the engineer of train 38T, that the train is lined and has a favorable signal (clear) for both this crossover as well as the next crossover, and that both are ‘medium speed’ (not exceeding 30mph) crossovers.
At the far left is the old Erie milepost that tells use we are 371 miles from Jersey City (the traditional eastern end of the line). The named location on the timetable conveniently coincides with the map and so the western end of the siding is called ‘Rock Glen’ for the western New York town of the same name. On many modern railroads, the timetable might simply refer to this control point as ‘CP371’.
At one time this was a traditional double track mainline with directional running in the current of traffic. Erie converted the route to single track with passing sidings and centralized traffic control-style signaling.
I don’t know for certain, but based on the current siding arrangement that is slewed around the home signal, I would guess that at some point after the time of original installation the siding was lengthened. Take note of the siding signal.
Among the peculiarities of Erie’s CTC style signaling was the use of home signals at sidings with the lower head located much lower than the top head. In effect this is an exaggerated arrangement that omits the center light featured on signals with three lights, such as on the signal on the right.
Erie wasn’t alone in this style of signaling, Southern Pacific also used low signals like this, although unlike the Erie, SP didn’t assign speed aspects.
In modern times, re-signaling by Conrail and Norfolk Southern has resulted in changes to traditional signaling practices. In some locations the lower light was raised to a point just below the main light. While more recent re-signaling has resulted in the outright replacement of searchlight hardware with modern color lights.
When I made this view, Rock Glen was among last places on the west end of the old Erie route that still featured this classic signaling arrangement. I was eager to make an image that featured the signals set up for a meet.
Presently I’m working on a book called ‘Classic Railroad Signaling’ (to be published by Voyageur Press) that will focus on traditional hardware including semaphores, searchlights, position lights & etc. This is a work in progress and comments are welcome!
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Tomorrow: Deconstructionist exercise.
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