I wonder if the lower signal ever changes from red? The next siding is Coleman, 5-1/2 Miles ahead. The lower red signal as seen in my second photo taken at Blythewood, SC never changes aspects -- it's always red and there's no siding ahead, except for the yard in Columbia and it's many miles distant. I almost wonder if the lower red signals at both locations are there to amplify the importance of the absolute signal? Yep, further explanation is needed!