frogstudio Posted August 26, 2009 Posted August 26, 2009 Hi to all train geeks. If got some simple question. When travelling in the subway, I always notice these small little signs (see pics). Tey have different numbers, letters and dot patters. Has anynone any idea of what they are for and where I can find reference on them? Many thanks. Quote
WesternOutlaw Posted September 7, 2009 Posted September 7, 2009 I wonder if they're some sort of mile markers. Quote
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