These icons were extracted from images on Carsten S. Lundsten's web site, with updates by Dick Bronson. Please see http://www.lundsten.dk/us_signaling/abs_st_sp/index.html#example Your usage of these is subject to the licensing terms in the COPYING file. Images with names like "right-yellow-marker.gif" represent: "right" - the signal is for a right-bound train "yellow" - the searchilight aspect is yellow (c.f. "red-green" for red over green) "marker" - the mast has a marker plate, e.g. is a block signal "held" - the signal is being held (red) by logic "flashing" - the image represents a flashing signal on the layout "short" - the image is for a dwarf or dual head signal "white" - actually gray outline so it will show against black background panels