keyboardkat wrote:I notice that the yard tracks underneath the overpass in the photo appear to have underruning third rails. Which line uses that? I thought the ex-NYC lines of Metro North was the only line to use underruning third rail (also the Moscow subway, but I'm talking about in this country).That's the Market-Frankford El, 5' - 2 1/4" (I'm pretty sure), dating from 1908.