These icons were extracted from images on Carsten S. Lundsten's web site. Please see http://www.lundsten.dk/us_signaling/abs_st_sp/index.html#example Images with names like "os-upper-right-closed.gif" represent: "os" - turnout with end-of-track-circuit markers in this icon. "turnout" - there are no end-of-track-circuit markers. "segment" - straight track segment "block", "block-end" - icons for drawing a straight block "upper" - the diverging route is above the horizontal mainline "right" - the diverging route goes to the right "closed" - the mainline is selected (c.f. "thrown" for diverging route selected)
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