A distant signal of the
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/kssignal.html">Ks
system</a> seen from an S-Bahn (urban train) approaching Sindorf (on
Cologne-Aachen) from west on 12 December 2002. It announces a speed restriction
of 80 km/h at the point where the single S-Bahn track branches into two tracks.
The signal rulebook says that the green light is blinking in this case, and
Murphy's Law says that it is dark in the moment when you take the picture...
<p>
Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph
Schmitz</a>