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Gary and others ... <br /> <br />Thanks for the help. I'm not sure if this is the answer because I wasn't there for the conversation so I can't 'read between the lines' regarding what was meant by the 'Wayward Signal' comment. <br /> <br />I am hoping someone can help me sort out another question. We received a site plan with topographic annotations at a gravel road grade crossing which is equiped with a crossing gate. On one rail off each side of the crossing is an annotation labeled 'riser' pointing to the rail. An electric line is indicated from the riser to a railroad control box at the site. Are these the occupancy detectors for the crossing? Can anyone help me understand how they work? Thanks. - Ed
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