This sign at the catenary marks the border of the working area at a new track.
Some meters further on are the insulators that seperate the working area (with
no voltage) from the area with high voltage. Seen at Horrem (on Cologne-Aachen)
on 1 February 2002.
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Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph Schmitz</a>